51330564445646 has 16 divisors (see below), whose sum is σ = 81116539637760. Its totient is φ = 24293993899320.

The previous prime is 51330564445603. The next prime is 51330564445661. The reversal of 51330564445646 is 64654446503315.

It is a junction number, because it is equal to n+sod(n) for n = 51330564445591 and 51330564445600.

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, 568954190 + ... + 569044401.

It is an arithmetic number, because the mean of its divisors is an integer number (5069783727360).

Almost surely, 2^{51330564445646} is an apocalyptic number.

51330564445646 is a deficient number, since it is larger than the sum of its proper divisors (29785975192114).

51330564445646 is a wasteful number, since it uses less digits than its factorization.

51330564445646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137999799.

The product of its (nonzero) digits is 62208000, while the sum is 56.

The spelling of 51330564445646 in words is "fifty-one trillion, three hundred thirty billion, five hundred sixty-four million, four hundred forty-five thousand, six hundred forty-six".