138998099620 has 24 divisors (see below), whose sum is σ = 294624013824. Its totient is φ = 55079619936.

The previous prime is 138998099599. The next prime is 138998099627. The reversal of 138998099620 is 26990899831.

138998099620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138998099627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32474052 + ... + 32478331.

It is an arithmetic number, because the mean of its divisors is an integer number (12276000576).

Almost surely, 2^138998099620 is an apocalyptic number.

138998099620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138998099620 is an abundant number, since it is smaller than the sum of its proper divisors (155625914204).

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

138998099620 is a wasteful number, since it uses less digits than its factorization.

138998099620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64952499 (or 64952497 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 64.

The spelling of 138998099620 in words is "one hundred thirty-eight billion, nine hundred ninety-eight million, ninety-nine thousand, six hundred twenty".