16518725648 has 40 divisors (see below), whose sum is σ = 34393504032. Its totient is φ = 7657486848.

The previous prime is 16518725623. The next prime is 16518725681. The reversal of 16518725648 is 84652781561.

It is a self number, because there is not a number n which added to its sum of digits gives 16518725648.

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, 434990 + ... + 471437.

Almost surely, 2^16518725648 is an apocalyptic number.

It is an amenable number.

16518725648 is an abundant number, since it is smaller than the sum of its proper divisors (17874778384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16518725648 is a wasteful number, since it uses less digits than its factorization.

16518725648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906519 (or 906513 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 53.

The spelling of 16518725648 in words is "sixteen billion, five hundred eighteen million, seven hundred twenty-five thousand, six hundred forty-eight".