138809375082 has 48 divisors (see below), whose sum is σ = 352550143680. Its totient is φ = 39657751848.

The previous prime is 138809375071. The next prime is 138809375093. The reversal of 138809375082 is 280573908831.

138809375082 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138809375071) and next prime (138809375093).

It is a super-2 number, since 2×138809375082² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 7234033 + ... + 7253195.

It is an arithmetic number, because the mean of its divisors is an integer number (7344794660).

Almost surely, 2^138809375082 is an apocalyptic number.

138809375082 is an abundant number, since it is smaller than the sum of its proper divisors (213740768598).

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

138809375082 is an frugal number, since it uses more digits than its factorization.

138809375082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38344 (or 19175 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 138809375082 in words is "one hundred thirty-eight billion, eight hundred nine million, three hundred seventy-five thousand, eighty-two".