51656550056555 has 32 divisors (see below), whose sum is σ = 64293742233600. Its totient is φ = 39800957299200.

The previous prime is 51656550056549. The next prime is 51656550056567. The reversal of 51656550056555 is 55565005565615.

It is not a de Polignac number, because 51656550056555 - 2¹⁰ = 51656550055531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51656550056494 and 51656550056503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58545656 + ... + 59421434.

It is an arithmetic number, because the mean of its divisors is an integer number (2009179444800).

Almost surely, 2^{51656550056555} is an apocalyptic number.

51656550056555 is a deficient number, since it is larger than the sum of its proper divisors (12637192177045).

51656550056555 is a wasteful number, since it uses less digits than its factorization.

51656550056555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877635.

The product of its (nonzero) digits is 84375000, while the sum is 59.

The spelling of 51656550056555 in words is "fifty-one trillion, six hundred fifty-six billion, five hundred fifty million, fifty-six thousand, five hundred fifty-five".