13897978008 has 32 divisors (see below), whose sum is σ = 34748750400. Its totient is φ = 4632151968.

The previous prime is 13897977979. The next prime is 13897978027. The reversal of 13897978008 is 80087979831.

It is a congruent number.

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, 239235 + ... + 291597.

It is an arithmetic number, because the mean of its divisors is an integer number (1085898450).

Almost surely, 2^13897978008 is an apocalyptic number.

It is an amenable number.

13897978008 is an abundant number, since it is smaller than the sum of its proper divisors (20850772392).

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

13897978008 is a wasteful number, since it uses less digits than its factorization.

13897978008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63431 (or 63427 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 60.

The spelling of 13897978008 in words is "thirteen billion, eight hundred ninety-seven million, nine hundred seventy-eight thousand, eight".