16250505664 has 28 divisors (see below), whose sum is σ = 32295098224. Its totient is φ = 8113158144.

The previous prime is 16250505659. The next prime is 16250505673. The reversal of 16250505664 is 46650505261.

It is a congruent number.

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, 145572 + ... + 231715.

Almost surely, 2^16250505664 is an apocalyptic number.

It is an amenable number.

16250505664 is a deficient number, since it is larger than the sum of its proper divisors (16044592560).

16250505664 is an equidigital number, since it uses as much as digits as its factorization.

16250505664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377972 (or 377962 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 16250505664 in words is "sixteen billion, two hundred fifty million, five hundred five thousand, six hundred sixty-four".