51156097520 has 40 divisors (see below), whose sum is σ = 129750467760. Its totient is φ = 18602216960.

The previous prime is 51156097501. The next prime is 51156097537. The reversal of 51156097520 is 2579065115.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 29065085 + ... + 29066844.

It is an arithmetic number, because the mean of its divisors is an integer number (3243761694).

Almost surely, 2^51156097520 is an apocalyptic number.

It is an amenable number.

51156097520 is an abundant number, since it is smaller than the sum of its proper divisors (78594370240).

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

51156097520 is a wasteful number, since it uses less digits than its factorization.

51156097520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58131953 (or 58131947 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 41.

The spelling of 51156097520 in words is "fifty-one billion, one hundred fifty-six million, ninety-seven thousand, five hundred twenty".