51640556074 has 8 divisors (see below), whose sum is σ = 77526095328. Its totient is φ = 25798524300.

The previous prime is 51640556053. The next prime is 51640556111. The reversal of 51640556074 is 47065504615.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51640556074.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10873902 + ... + 10878649.

It is an arithmetic number, because the mean of its divisors is an integer number (9690761916).

Almost surely, 2^51640556074 is an apocalyptic number.

51640556074 is a deficient number, since it is larger than the sum of its proper divisors (25885539254).

51640556074 is a wasteful number, since it uses less digits than its factorization.

51640556074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21753740.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 51640556074 in words is "fifty-one billion, six hundred forty million, five hundred fifty-six thousand, seventy-four".