138999996636400 has 120 divisors (see below), whose sum is σ = 344141017877664. Its totient is φ = 53919086284800.

The previous prime is 138999996636383. The next prime is 138999996636419. The reversal of 138999996636400 is 4636699999831.

It is a super-2 number, since 2×138999996636400² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (82).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22637277 + ... + 28114876.

Almost surely, 2^{138999996636400} is an apocalyptic number.

138999996636400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138999996636400 is an abundant number, since it is smaller than the sum of its proper divisors (205141021241264).

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

138999996636400 is a wasteful number, since it uses less digits than its factorization.

138999996636400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50752379 (or 50752368 counting only the distinct ones).

The product of its (nonzero) digits is 3673320192, while the sum is 82.

The spelling of 138999996636400 in words is "one hundred thirty-eight trillion, nine hundred ninety-nine billion, nine hundred ninety-six million, six hundred thirty-six thousand, four hundred".