138359345840 has 40 divisors (see below), whose sum is σ = 321730607328. Its totient is φ = 55335974400.

The previous prime is 138359345783. The next prime is 138359345857. The reversal of 138359345840 is 48543953831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470444 + ... + 705716.

Almost surely, 2^138359345840 is an apocalyptic number.

138359345840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138359345840 is an abundant number, since it is smaller than the sum of its proper divisors (183371261488).

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

138359345840 is a wasteful number, since it uses less digits than its factorization.

138359345840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242637 (or 242631 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 138359345840 in words is "one hundred thirty-eight billion, three hundred fifty-nine million, three hundred forty-five thousand, eight hundred forty".