138793893255 has 24 divisors (see below), whose sum is σ = 249486309072. Its totient is φ = 74023409088.

The previous prime is 138793893233. The next prime is 138793893299. The reversal of 138793893255 is 552398397831.

138793893255 is a `hidden beast` number, since 138 + 79 + 389 + 3 + 2 + 55 = 666.

It is not a de Polignac number, because 138793893255 - 2¹⁰ = 138793892231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138793893192 and 138793893201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57115614 + ... + 57118043.

It is an arithmetic number, because the mean of its divisors is an integer number (10395262878).

Almost surely, 2^138793893255 is an apocalyptic number.

138793893255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138793893255 is a deficient number, since it is larger than the sum of its proper divisors (110692415817).

138793893255 is an equidigital number, since it uses as much as digits as its factorization.

138793893255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114233677 (or 114233665 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The spelling of 138793893255 in words is "one hundred thirty-eight billion, seven hundred ninety-three million, eight hundred ninety-three thousand, two hundred fifty-five".