51440143950 has 216 divisors, whose sum is σ = 150345301392. Its totient is φ = 12603502080.

The previous prime is 51440143949. The next prime is 51440143967. The reversal of 51440143950 is 5934104415.

It is a happy number.

51440143950 is a `hidden beast` number, since 514 + 40 + 14 + 3 + 95 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 17718199 + ... + 17721101.

It is an arithmetic number, because the mean of its divisors is an integer number (696043062).

Almost surely, 2^51440143950 is an apocalyptic number.

51440143950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51440143950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75172650696).

51440143950 is an abundant number, since it is smaller than the sum of its proper divisors (98905157442).

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

51440143950 is a wasteful number, since it uses less digits than its factorization.

51440143950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180 (or 3159 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 51440143950 in words is "fifty-one billion, four hundred forty million, one hundred forty-three thousand, nine hundred fifty".