138526455492 has 36 divisors (see below), whose sum is σ = 354098532060. Its totient is φ = 45656658432.

The previous prime is 138526455461. The next prime is 138526455503. The reversal of 138526455492 is 294554625831.

138526455492 is a `hidden beast` number, since 1 + 3 + 8 + 52 + 6 + 45 + 549 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 36258253056 + 102268202436 = 190416^2 + 319794^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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, 21614533 + ... + 21620940.

It is an arithmetic number, because the mean of its divisors is an integer number (9836070335).

Almost surely, 2^138526455492 is an apocalyptic number.

138526455492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138526455492 is an abundant number, since it is smaller than the sum of its proper divisors (215572076568).

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

138526455492 is a wasteful number, since it uses less digits than its factorization.

138526455492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43235572 (or 43235567 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 54.

The spelling of 138526455492 in words is "one hundred thirty-eight billion, five hundred twenty-six million, four hundred fifty-five thousand, four hundred ninety-two".