138233863680 has 160 divisors (see below), whose sum is σ = 482090894208. Its totient is φ = 33511219200.

The previous prime is 138233863679. The next prime is 138233863687. The reversal of 138233863680 is 86368332831.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138233863687) 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, 733666 + ... + 902625.

Almost surely, 2^138233863680 is an apocalyptic number.

138233863680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138233863680 is an abundant number, since it is smaller than the sum of its proper divisors (343857030528).

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

138233863680 is a wasteful number, since it uses less digits than its factorization.

138233863680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636328 (or 1636312 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 138233863680 in words is "one hundred thirty-eight billion, two hundred thirty-three million, eight hundred sixty-three thousand, six hundred eighty".