72810660646 has 32 divisors (see below), whose sum is σ = 123790032000. Its totient is φ = 31910285952.

The previous prime is 72810660613. The next prime is 72810660667. The reversal of 72810660646 is 64606601827.

It is a junction number, because it is equal to n+sod(n) for n = 72810660596 and 72810660605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 917056 + ... + 993283.

It is an arithmetic number, because the mean of its divisors is an integer number (3868438500).

Almost surely, 2^72810660646 is an apocalyptic number.

72810660646 is a deficient number, since it is larger than the sum of its proper divisors (50979371354).

72810660646 is a wasteful number, since it uses less digits than its factorization.

72810660646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910436.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 72810660646 in words is "seventy-two billion, eight hundred ten million, six hundred sixty thousand, six hundred forty-six".