138500585838 has 24 divisors (see below), whose sum is σ = 302447478528. Its totient is φ = 45803342592.

The previous prime is 138500585819. The next prime is 138500585857. The reversal of 138500585838 is 838585005831.

138500585838 is a `hidden beast` number, since 1 + 3 + 8 + 5 + 0 + 0 + 58 + 583 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (138500585819) and next prime (138500585857).

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, 30290931 + ... + 30295502.

It is an arithmetic number, because the mean of its divisors is an integer number (12601978272).

Almost surely, 2^138500585838 is an apocalyptic number.

138500585838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138500585838 is an abundant number, since it is smaller than the sum of its proper divisors (163946892690).

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

138500585838 is a wasteful number, since it uses less digits than its factorization.

138500585838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60586568 (or 60586565 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 54.

The spelling of 138500585838 in words is "one hundred thirty-eight billion, five hundred million, five hundred eighty-five thousand, eight hundred thirty-eight".