138920894756 has 12 divisors (see below), whose sum is σ = 277841789568. Its totient is φ = 59537526312.

The previous prime is 138920894747. The next prime is 138920894767. The reversal of 138920894756 is 657498029831.

138920894756 is an admirable number.

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, 2480730236 + ... + 2480730291.

It is an arithmetic number, because the mean of its divisors is an integer number (23153482464).

It is a 1-persistent number, because it is pandigital, but 2⋅138920894756 = 277841789512 is not.

Almost surely, 2^138920894756 is an apocalyptic number.

It is an amenable number.

138920894756 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138920894756 is a wasteful number, since it uses less digits than its factorization.

138920894756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4961460538 (or 4961460536 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 138920894756 in words is "one hundred thirty-eight billion, nine hundred twenty million, eight hundred ninety-four thousand, seven hundred fifty-six".