138999634848 has 96 divisors (see below), whose sum is σ = 407903227200. Its totient is φ = 46048912128.

The previous prime is 138999634843. The next prime is 138999634849. The reversal of 138999634848 is 848436999831.

138999634848 is a `hidden beast` number, since 1 + 3 + 89 + 9 + 9 + 63 + 484 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (138999634841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352663 + ... + 634326.

It is an arithmetic number, because the mean of its divisors is an integer number (4248991950).

Almost surely, 2^138999634848 is an apocalyptic number.

138999634848 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138999634848 is an abundant number, since it is smaller than the sum of its proper divisors (268903592352).

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

138999634848 is a wasteful number, since it uses less digits than its factorization.

138999634848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987171 (or 987157 counting only the distinct ones).

The product of its digits is 322486272, while the sum is 72.

The spelling of 138999634848 in words is "one hundred thirty-eight billion, nine hundred ninety-nine million, six hundred thirty-four thousand, eight hundred forty-eight".