65416644015 has 16 divisors (see below), whose sum is σ = 105991526400. Its totient is φ = 34447244832.

The previous prime is 65416643989. The next prime is 65416644019. The reversal of 65416644015 is 51044661456.

It is a happy number.

It is not a de Polignac number, because 65416644015 - 2⁸ = 65416643759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65416644019) 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, 27600775 + ... + 27603144.

It is an arithmetic number, because the mean of its divisors is an integer number (6624470400).

Almost surely, 2^65416644015 is an apocalyptic number.

65416644015 is a deficient number, since it is larger than the sum of its proper divisors (40574882385).

65416644015 is a wasteful number, since it uses less digits than its factorization.

65416644015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55204006.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 65416644015 in words is "sixty-five billion, four hundred sixteen million, six hundred forty-four thousand, fifteen".