51645430654 has 16 divisors (see below), whose sum is σ = 80014348800. Its totient is φ = 24974965080.

The previous prime is 51645430607. The next prime is 51645430667. The reversal of 51645430654 is 45603454615.

It is a self number, because there is not a number n which added to its sum of digits gives 51645430654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139804 + ... + 350479.

It is an arithmetic number, because the mean of its divisors is an integer number (5000896800).

Almost surely, 2^51645430654 is an apocalyptic number.

51645430654 is a deficient number, since it is larger than the sum of its proper divisors (28368918146).

51645430654 is a wasteful number, since it uses less digits than its factorization.

51645430654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492015.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 51645430654 in words is "fifty-one billion, six hundred forty-five million, four hundred thirty thousand, six hundred fifty-four".