51605352500644 has 24 divisors (see below), whose sum is σ = 90409415927040. Its totient is φ = 25774092554496.

The previous prime is 51605352500629. The next prime is 51605352500699. The reversal of 51605352500644 is 44600525350615.

It is a super-2 number, since 2×51605352500644² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51605352500594 and 51605352500603.

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, 128398969 + ... + 128800255.

It is an arithmetic number, because the mean of its divisors is an integer number (3767058996960).

Almost surely, 2^{51605352500644} is an apocalyptic number.

It is an amenable number.

51605352500644 is a deficient number, since it is larger than the sum of its proper divisors (38804063426396).

51605352500644 is a wasteful number, since it uses less digits than its factorization.

51605352500644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436827 (or 436825 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 46.

The spelling of 51605352500644 in words is "fifty-one trillion, six hundred five billion, three hundred fifty-two million, five hundred thousand, six hundred forty-four".