16639875400 has 48 divisors (see below), whose sum is σ = 40963466340. Its totient is φ = 6264422400.

The previous prime is 16639875377. The next prime is 16639875419. The reversal of 16639875400 is 457893661.

It can be written as a sum of positive squares in 6 ways, for example, as 13606289316 + 3033586084 = 116646^2 + 55078^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2443641 + ... + 2450440.

Almost surely, 2^16639875400 is an apocalyptic number.

16639875400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16639875400 is an abundant number, since it is smaller than the sum of its proper divisors (24323590940).

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

16639875400 is a wasteful number, since it uses less digits than its factorization.

16639875400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894114 (or 4894105 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 16639875400 in words is "sixteen billion, six hundred thirty-nine million, eight hundred seventy-five thousand, four hundred".