138901500640 has 96 divisors (see below), whose sum is σ = 391339952640. Its totient is φ = 45552781824.

The previous prime is 138901500631. The next prime is 138901500649. The reversal of 138901500640 is 46005109831.

It is an interprime number because it is at equal distance from previous prime (138901500631) and next prime (138901500649).

It is a self number, because there is not a number n which added to its sum of digits gives 138901500640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138901500649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2670310 + ... + 2721829.

It is an arithmetic number, because the mean of its divisors is an integer number (4076457840).

Almost surely, 2^138901500640 is an apocalyptic number.

138901500640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138901500640 is an abundant number, since it is smaller than the sum of its proper divisors (252438452000).

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

138901500640 is a wasteful number, since it uses less digits than its factorization.

138901500640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392184 (or 5392176 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 138901500640 in words is "one hundred thirty-eight billion, nine hundred one million, five hundred thousand, six hundred forty".