138694234560 has 112 divisors (see below), whose sum is σ = 503261961216. Its totient is φ = 31701537792.

The previous prime is 138694234537. The next prime is 138694234573. The reversal of 138694234560 is 65432496831.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10312792 + ... + 10326231.

It is an arithmetic number, because the mean of its divisors is an integer number (4493410368).

Almost surely, 2^138694234560 is an apocalyptic number.

138694234560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138694234560 is an abundant number, since it is smaller than the sum of its proper divisors (364567726656).

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

138694234560 is a wasteful number, since it uses less digits than its factorization.

138694234560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20639050 (or 20639040 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 51.

The spelling of 138694234560 in words is "one hundred thirty-eight billion, six hundred ninety-four million, two hundred thirty-four thousand, five hundred sixty".