65728519879 has 16 divisors (see below), whose sum is σ = 72468295200. Its totient is φ = 59116584960.

The previous prime is 65728519867. The next prime is 65728519889. The reversal of 65728519879 is 97891582756.

It is a cyclic number.

It is not a de Polignac number, because 65728519879 - 2¹¹ = 65728517831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65728519819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3632647 + ... + 3650695.

It is an arithmetic number, because the mean of its divisors is an integer number (4529268450).

Almost surely, 2^65728519879 is an apocalyptic number.

65728519879 is a deficient number, since it is larger than the sum of its proper divisors (6739775321).

65728519879 is a wasteful number, since it uses less digits than its factorization.

65728519879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21570.

The product of its digits is 76204800, while the sum is 67.

The spelling of 65728519879 in words is "sixty-five billion, seven hundred twenty-eight million, five hundred nineteen thousand, eight hundred seventy-nine".