138252328540 has 48 divisors (see below), whose sum is σ = 298238046624. Its totient is φ = 53795232000.

The previous prime is 138252328537. The next prime is 138252328547. The reversal of 138252328540 is 45823252831.

It is a super-2 number, since 2×138252328540² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138252328547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4202355 + ... + 4235125.

It is an arithmetic number, because the mean of its divisors is an integer number (6213292638).

Almost surely, 2^138252328540 is an apocalyptic number.

138252328540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138252328540 is an abundant number, since it is smaller than the sum of its proper divisors (159985718084).

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

138252328540 is a wasteful number, since it uses less digits than its factorization.

138252328540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38518 (or 38516 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The spelling of 138252328540 in words is "one hundred thirty-eight billion, two hundred fifty-two million, three hundred twenty-eight thousand, five hundred forty".