51000656511 has 16 divisors (see below), whose sum is σ = 77718527744. Its totient is φ = 29142016704.

The previous prime is 51000656471. The next prime is 51000656537. The reversal of 51000656511 is 11565600015.

It is not a de Polignac number, because 51000656511 - 2²³ = 50992267903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000656111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786840 + ... + 849186.

It is an arithmetic number, because the mean of its divisors is an integer number (4857407984).

Almost surely, 2^51000656511 is an apocalyptic number.

51000656511 is a deficient number, since it is larger than the sum of its proper divisors (26717871233).

51000656511 is a wasteful number, since it uses less digits than its factorization.

51000656511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101310.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 51000656511 in words is "fifty-one billion, six hundred fifty-six thousand, five hundred eleven".