16502660644 has 12 divisors (see below), whose sum is σ = 28910158704. Its totient is φ = 8242615304.

The previous prime is 16502660639. The next prime is 16502660651. The reversal of 16502660644 is 44606620561.

It is a junction number, because it is equal to n+sod(n) for n = 16502660597 and 16502660606.

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, 2174494 + ... + 2182069.

It is an arithmetic number, because the mean of its divisors is an integer number (2409179892).

Almost surely, 2^16502660644 is an apocalyptic number.

It is an amenable number.

16502660644 is a deficient number, since it is larger than the sum of its proper divisors (12407498060).

16502660644 is a wasteful number, since it uses less digits than its factorization.

16502660644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357514 (or 4357512 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 16502660644 in words is "sixteen billion, five hundred two million, six hundred sixty thousand, six hundred forty-four".