138074665056 has 24 divisors (see below), whose sum is σ = 362445996024. Its totient is φ = 46024888320.

The previous prime is 138074665051. The next prime is 138074665097. The reversal of 138074665056 is 650566470831.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×138074665056² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138074665051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719138785 + ... + 719138976.

It is an arithmetic number, because the mean of its divisors is an integer number (15101916501).

Almost surely, 2^138074665056 is an apocalyptic number.

138074665056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138074665056 is an abundant number, since it is smaller than the sum of its proper divisors (224371330968).

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

138074665056 is a wasteful number, since it uses less digits than its factorization.

138074665056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438277774 (or 1438277766 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 138074665056 in words is "one hundred thirty-eight billion, seventy-four million, six hundred sixty-five thousand, fifty-six".