16636627920 has 160 divisors (see below), whose sum is σ = 57324081024. Its totient is φ = 3956992000.

The previous prime is 16636627919. The next prime is 16636627937. The reversal of 16636627920 is 2972663661.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 16636627920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80470 + ... + 199370.

Almost surely, 2^16636627920 is an apocalyptic number.

16636627920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16636627920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28662040512).

16636627920 is an abundant number, since it is smaller than the sum of its proper divisors (40687453104).

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

16636627920 is a wasteful number, since it uses less digits than its factorization.

16636627920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118981 (or 118975 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 16636627920 in words is "sixteen billion, six hundred thirty-six million, six hundred twenty-seven thousand, nine hundred twenty".