138790813816 has 8 divisors (see below), whose sum is σ = 260232775920. Its totient is φ = 69395406904.

The previous prime is 138790813801. The next prime is 138790813873. The reversal of 138790813816 is 618318097831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8674425856 + ... + 8674425871.

It is an arithmetic number, because the mean of its divisors is an integer number (32529096990).

Almost surely, 2^138790813816 is an apocalyptic number.

It is an amenable number.

138790813816 is a deficient number, since it is larger than the sum of its proper divisors (121441962104).

138790813816 is a wasteful number, since it uses less digits than its factorization.

138790813816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17348851733 (or 17348851729 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 138790813816 in words is "one hundred thirty-eight billion, seven hundred ninety million, eight hundred thirteen thousand, eight hundred sixteen".