138195657624 has 32 divisors (see below), whose sum is σ = 351152904240. Its totient is φ = 45310051200.

The previous prime is 138195657617. The next prime is 138195657647. The reversal of 138195657624 is 426756591831.

It is a super-2 number, since 2×138195657624² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47196507 + ... + 47199434.

Almost surely, 2^138195657624 is an apocalyptic number.

It is an amenable number.

138195657624 is an abundant number, since it is smaller than the sum of its proper divisors (212957246616).

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

138195657624 is a wasteful number, since it uses less digits than its factorization.

138195657624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94396011 (or 94396007 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 57.

The spelling of 138195657624 in words is "one hundred thirty-eight billion, one hundred ninety-five million, six hundred fifty-seven thousand, six hundred twenty-four".