64005136516015 has 16 divisors (see below), whose sum is σ = 77377723750080. Its totient is φ = 50823621100800.

The previous prime is 64005136515997. The next prime is 64005136516037. The reversal of 64005136516015 is 51061563150046.

It is not a de Polignac number, because 64005136516015 - 2¹⁵ = 64005136483247 is a prime.

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, 33561534 + ... + 35417323.

It is an arithmetic number, because the mean of its divisors is an integer number (4836107734380).

Almost surely, 2^{64005136516015} is an apocalyptic number.

64005136516015 is a deficient number, since it is larger than the sum of its proper divisors (13372587234065).

64005136516015 is a wasteful number, since it uses less digits than its factorization.

64005136516015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68980242.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 64005136516015 in words is "sixty-four trillion, five billion, one hundred thirty-six million, five hundred sixteen thousand, fifteen".