16635623052 has 48 divisors (see below), whose sum is σ = 41529286400. Its totient is φ = 5167229760.

The previous prime is 16635623029. The next prime is 16635623063. The reversal of 16635623052 is 25032653661.

It is a self number, because there is not a number n which added to its sum of digits gives 16635623052.

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, 584152 + ... + 611967.

Almost surely, 2^16635623052 is an apocalyptic number.

16635623052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16635623052 is an abundant number, since it is smaller than the sum of its proper divisors (24893663348).

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

16635623052 is a wasteful number, since it uses less digits than its factorization.

16635623052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196206 (or 1196204 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 16635623052 in words is "sixteen billion, six hundred thirty-five million, six hundred twenty-three thousand, fifty-two".