138820013265 has 16 divisors (see below), whose sum is σ = 222116673600. Its totient is φ = 74035789632.

The previous prime is 138820013263. The next prime is 138820013281. The reversal of 138820013265 is 562310028831.

It is not a de Polignac number, because 138820013265 - 2¹ = 138820013263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138820013263) 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, 1222266 + ... + 1331004.

It is an arithmetic number, because the mean of its divisors is an integer number (13882292100).

Almost surely, 2^138820013265 is an apocalyptic number.

138820013265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138820013265 is a deficient number, since it is larger than the sum of its proper divisors (83296660335).

138820013265 is a wasteful number, since it uses less digits than its factorization.

138820013265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193856.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 138820013265 in words is "one hundred thirty-eight billion, eight hundred twenty million, thirteen thousand, two hundred sixty-five".