138968471564 has 24 divisors (see below), whose sum is σ = 265811113008. Its totient is φ = 63181990080.

The previous prime is 138968471533. The next prime is 138968471567. The reversal of 138968471564 is 465174869831.

It is a junction number, because it is equal to n+sod(n) for n = 138968471497 and 138968471506.

It is not an unprimeable number, because it can be changed into a prime (138968471567) 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, 19940327 + ... + 19947294.

It is an arithmetic number, because the mean of its divisors is an integer number (11075463042).

Almost surely, 2^138968471564 is an apocalyptic number.

It is an amenable number.

138968471564 is a deficient number, since it is larger than the sum of its proper divisors (126842641444).

138968471564 is a wasteful number, since it uses less digits than its factorization.

138968471564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39887705 (or 39887703 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 62.

The spelling of 138968471564 in words is "one hundred thirty-eight billion, nine hundred sixty-eight million, four hundred seventy-one thousand, five hundred sixty-four".