51700747500 has 480 divisors, whose sum is σ = 174440161280. Its totient is φ = 13226976000.

The previous prime is 51700747499. The next prime is 51700747541. The reversal of 51700747500 is 574700715.

51700747500 is a `hidden beast` number, since 517 + 0 + 0 + 74 + 75 + 0 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 317182419 + ... + 317182581.

Almost surely, 2^51700747500 is an apocalyptic number.

51700747500 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 51700747500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87220080640).

51700747500 is an abundant number, since it is smaller than the sum of its proper divisors (122739413780).

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

51700747500 is a wasteful number, since it uses less digits than its factorization.

51700747500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 34300, while the sum is 36.

The spelling of 51700747500 in words is "fifty-one billion, seven hundred million, seven hundred forty-seven thousand, five hundred".