51001016515657 has 8 divisors (see below), whose sum is σ = 54924399872384. Its totient is φ = 47077665764688.

The previous prime is 51001016515613. The next prime is 51001016515693. The reversal of 51001016515657 is 75651561010015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51001016515657 - 2¹¹ = 51001016513609 is a prime.

It is a super-2 number, since 2×51001016515657² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51001016575657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4853343 + ... + 11205220.

It is an arithmetic number, because the mean of its divisors is an integer number (6865549984048).

Almost surely, 2^{51001016515657} is an apocalyptic number.

It is an amenable number.

51001016515657 is a deficient number, since it is larger than the sum of its proper divisors (3923383356727).

51001016515657 is a wasteful number, since it uses less digits than its factorization.

51001016515657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16302879.

The product of its (nonzero) digits is 157500, while the sum is 43.

The spelling of 51001016515657 in words is "fifty-one trillion, one billion, sixteen million, five hundred fifteen thousand, six hundred fifty-seven".