138765656 has 16 divisors (see below), whose sum is σ = 262086840. Its totient is φ = 68875840.

The previous prime is 138765629. The next prime is 138765691. The reversal of 138765656 is 656567831.

It is a super-2 number, since 2×138765656² = 38511814570220672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138765656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62210 + ... + 64401.

Almost surely, 2^138765656 is an apocalyptic number.

It is an amenable number.

138765656 is a deficient number, since it is larger than the sum of its proper divisors (123321184).

138765656 is a wasteful number, since it uses less digits than its factorization.

138765656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126754 (or 126750 counting only the distinct ones).

The product of its digits is 907200, while the sum is 47.

The square root of 138765656 is about 11779.8835308334. The cubic root of 138765656 is about 517.7188737080.

The spelling of 138765656 in words is "one hundred thirty-eight million, seven hundred sixty-five thousand, six hundred fifty-six".