138523813976 has 32 divisors (see below), whose sum is σ = 260172825600. Its totient is φ = 69144503040.

The previous prime is 138523813973. The next prime is 138523813979. The reversal of 138523813976 is 679318325831.

It is an interprime number because it is at equal distance from previous prime (138523813973) and next prime (138523813979).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138523813973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12405836 + ... + 12416996.

It is an arithmetic number, because the mean of its divisors is an integer number (8130400800).

Almost surely, 2^138523813976 is an apocalyptic number.

It is an amenable number.

138523813976 is a deficient number, since it is larger than the sum of its proper divisors (121649011624).

138523813976 is a wasteful number, since it uses less digits than its factorization.

138523813976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13659 (or 13655 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 56.

The spelling of 138523813976 in words is "one hundred thirty-eight billion, five hundred twenty-three million, eight hundred thirteen thousand, nine hundred seventy-six".