51028700657155 has 16 divisors (see below), whose sum is σ = 67727073806784. Its totient is φ = 36664280553600.

The previous prime is 51028700657141. The next prime is 51028700657219. The reversal of 51028700657155 is 55175600782015.

It is a de Polignac number, because none of the positive numbers 2^k-51028700657155 is a prime.

It is a super-2 number, since 2×51028700657155² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10608875071 + ... + 10608879880.

It is an arithmetic number, because the mean of its divisors is an integer number (4232942112924).

Almost surely, 2^{51028700657155} is an apocalyptic number.

51028700657155 is a deficient number, since it is larger than the sum of its proper divisors (16698373149629).

51028700657155 is a wasteful number, since it uses less digits than its factorization.

51028700657155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21217755006.

The product of its (nonzero) digits is 2940000, while the sum is 52.

The spelling of 51028700657155 in words is "fifty-one trillion, twenty-eight billion, seven hundred million, six hundred fifty-seven thousand, one hundred fifty-five".