138528717732 has 36 divisors (see below), whose sum is σ = 350200259136. Its totient is φ = 46172224560.

The previous prime is 138528717731. The next prime is 138528717757. The reversal of 138528717732 is 237717825831.

138528717732 is a `hidden beast` number, since 1 + 38 + 528 + 7 + 17 + 73 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (138528717731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268057 + ... + 590687.

It is an arithmetic number, because the mean of its divisors is an integer number (9727784976).

Almost surely, 2^138528717732 is an apocalyptic number.

138528717732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138528717732 is an abundant number, since it is smaller than the sum of its proper divisors (211671541404).

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

138528717732 is a wasteful number, since it uses less digits than its factorization.

138528717732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334568 (or 334563 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The spelling of 138528717732 in words is "one hundred thirty-eight billion, five hundred twenty-eight million, seven hundred seventeen thousand, seven hundred thirty-two".