51000505556506 has 64 divisors (see below), whose sum is σ = 88441967093760. Its totient is φ = 21799280885760.

The previous prime is 51000505556437. The next prime is 51000505556519. The reversal of 51000505556506 is 60565550500015.

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, 3100891975 + ... + 3100908421.

It is an arithmetic number, because the mean of its divisors is an integer number (1381905735840).

Almost surely, 2^{51000505556506} is an apocalyptic number.

51000505556506 is a deficient number, since it is larger than the sum of its proper divisors (37441461537254).

51000505556506 is a wasteful number, since it uses less digits than its factorization.

51000505556506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23239.

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 51000505556506 in words is "fifty-one trillion, five hundred five million, five hundred fifty-six thousand, five hundred six".