138897960652 has 12 divisors (see below), whose sum is σ = 265168834056. Its totient is φ = 63135436640.

The previous prime is 138897960629. The next prime is 138897960671. The reversal of 138897960652 is 256069798831.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578385873 + ... + 1578385960.

It is an arithmetic number, because the mean of its divisors is an integer number (22097402838).

Almost surely, 2^138897960652 is an apocalyptic number.

It is an amenable number.

138897960652 is a deficient number, since it is larger than the sum of its proper divisors (126270873404).

138897960652 is a wasteful number, since it uses less digits than its factorization.

138897960652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156771848 (or 3156771846 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 64.

The spelling of 138897960652 in words is "one hundred thirty-eight billion, eight hundred ninety-seven million, nine hundred sixty thousand, six hundred fifty-two".