16878639404 has 24 divisors (see below), whose sum is σ = 32273024448. Its totient is φ = 7660164240.

The previous prime is 16878639373. The next prime is 16878639443. The reversal of 16878639404 is 40493687861.

It is a super-2 number, since 2×16878639404² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16878639404.

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, 270002 + ... + 326585.

It is an arithmetic number, because the mean of its divisors is an integer number (1344709352).

Almost surely, 2^16878639404 is an apocalyptic number.

It is an amenable number.

16878639404 is a deficient number, since it is larger than the sum of its proper divisors (15394385044).

16878639404 is a wasteful number, since it uses less digits than its factorization.

16878639404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597245 (or 597243 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 16878639404 in words is "sixteen billion, eight hundred seventy-eight million, six hundred thirty-nine thousand, four hundred four".