138726028524 has 48 divisors (see below), whose sum is σ = 334889503200. Its totient is φ = 44642981376.

The previous prime is 138726028517. The next prime is 138726028531. The reversal of 138726028524 is 425820627831.

It is an interprime number because it is at equal distance from previous prime (138726028517) and next prime (138726028531).

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, 6656232 + ... + 6677040.

It is an arithmetic number, because the mean of its divisors is an integer number (6976864650).

Almost surely, 2^138726028524 is an apocalyptic number.

It is an amenable number.

138726028524 is an abundant number, since it is smaller than the sum of its proper divisors (196163474676).

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

138726028524 is a wasteful number, since it uses less digits than its factorization.

138726028524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40002 (or 40000 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 138726028524 in words is "one hundred thirty-eight billion, seven hundred twenty-six million, twenty-eight thousand, five hundred twenty-four".