51140023555500 has 480 divisors, whose sum is σ = 182121516472896. Its totient is φ = 12390192000000.

The previous prime is 51140023555499. The next prime is 51140023555501. The reversal of 51140023555500 is 555532004115.

51140023555500 is a `hidden beast` number, since 5 + 1 + 140 + 0 + 2 + 3 + 5 + 5 + 5 + 500 = 666.

51140023555500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51140023555499) and next prime (51140023555501).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51140023555501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 766672150 + ... + 766738850.

Almost surely, 2^{51140023555500} is an apocalyptic number.

51140023555500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51140023555500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91060758236448).

51140023555500 is an abundant number, since it is smaller than the sum of its proper divisors (130981492917396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51140023555500 is a wasteful number, since it uses less digits than its factorization.

51140023555500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68464 (or 68443 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

Adding to 51140023555500 its reverse (555532004115), we get a palindrome (51695555559615).

The spelling of 51140023555500 in words is "fifty-one trillion, one hundred forty billion, twenty-three million, five hundred fifty-five thousand, five hundred".