138218595620 has 48 divisors (see below), whose sum is σ = 331780192128. Its totient is φ = 47381295360.

The previous prime is 138218595617. The next prime is 138218595631. The reversal of 138218595620 is 26595812831.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 788840 + ... + 948000.

It is an arithmetic number, because the mean of its divisors is an integer number (6912087336).

Almost surely, 2^138218595620 is an apocalyptic number.

138218595620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138218595620 is an abundant number, since it is smaller than the sum of its proper divisors (193561596508).

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

138218595620 is a wasteful number, since it uses less digits than its factorization.

138218595620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165380 (or 165378 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 138218595620 in words is "one hundred thirty-eight billion, two hundred eighteen million, five hundred ninety-five thousand, six hundred twenty".