138004601565 has 16 divisors (see below), whose sum is σ = 220812536448. Its totient is φ = 73600729536.

The previous prime is 138004601543. The next prime is 138004601573. The reversal of 138004601565 is 565106400831.

It is not a de Polignac number, because 138004601565 - 2⁵ = 138004601533 is a prime.

It is a super-2 number, since 2×138004601565² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800712 + ... + 957678.

It is an arithmetic number, because the mean of its divisors is an integer number (13800783528).

Almost surely, 2^138004601565 is an apocalyptic number.

138004601565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138004601565 is a deficient number, since it is larger than the sum of its proper divisors (82807934883).

138004601565 is a wasteful number, since it uses less digits than its factorization.

138004601565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215588.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 138004601565 in words is "one hundred thirty-eight billion, four million, six hundred one thousand, five hundred sixty-five".