138788377864 has 64 divisors (see below), whose sum is σ = 264975408000. Its totient is φ = 68140638720.

The previous prime is 138788377853. The next prime is 138788377879. The reversal of 138788377864 is 468773887831.

It is a junction number, because it is equal to n+sod(n) for n = 138788377793 and 138788377802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106513837 + ... + 106515139.

It is an arithmetic number, because the mean of its divisors is an integer number (4140240750).

Almost surely, 2^138788377864 is an apocalyptic number.

It is an amenable number.

138788377864 is a deficient number, since it is larger than the sum of its proper divisors (126187030136).

138788377864 is a wasteful number, since it uses less digits than its factorization.

138788377864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318 (or 2314 counting only the distinct ones).

The product of its digits is 303464448, while the sum is 70.

The spelling of 138788377864 in words is "one hundred thirty-eight billion, seven hundred eighty-eight million, three hundred seventy-seven thousand, eight hundred sixty-four".