51001016515656 has 32 divisors (see below), whose sum is σ = 128740430045760. Its totient is φ = 16835287004352.

The previous prime is 51001016515613. The next prime is 51001016515693. The reversal of 51001016515656 is 65651561010015.

51001016515656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51001016515656² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10315737115 + ... + 10315742058.

It is an arithmetic number, because the mean of its divisors is an integer number (4023138438930).

Almost surely, 2^{51001016515656} is an apocalyptic number.

It is an amenable number.

51001016515656 is an abundant number, since it is smaller than the sum of its proper divisors (77739413530104).

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

51001016515656 is a wasteful number, since it uses less digits than its factorization.

51001016515656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20631479285 (or 20631479281 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 51001016515656 in words is "fifty-one trillion, one billion, sixteen million, five hundred fifteen thousand, six hundred fifty-six".