138501231552 has 84 divisors (see below), whose sum is σ = 404479216440. Its totient is φ = 45295990272.

The previous prime is 138501231509. The next prime is 138501231577. The reversal of 138501231552 is 255132105831.

138501231552 is a `hidden beast` number, since 1 + 3 + 85 + 0 + 1 + 23 + 1 + 552 = 666.

It is a super-2 number, since 2×138501231552² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2237902 + ... + 2298957.

Almost surely, 2^138501231552 is an apocalyptic number.

138501231552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138501231552 is an abundant number, since it is smaller than the sum of its proper divisors (265977984888).

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

138501231552 is a wasteful number, since it uses less digits than its factorization.

138501231552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536930 (or 4536917 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 138501231552 in words is "one hundred thirty-eight billion, five hundred one million, two hundred thirty-one thousand, five hundred fifty-two".