65397021879 has 16 divisors (see below), whose sum is σ = 99687025152. Its totient is φ = 37356819168.

The previous prime is 65397021857. The next prime is 65397021883. The reversal of 65397021879 is 97812079356.

It is not a de Polignac number, because 65397021879 - 2⁵ = 65397021847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65397025879) 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, 475404 + ... + 597329.

It is an arithmetic number, because the mean of its divisors is an integer number (6230439072).

Almost surely, 2^65397021879 is an apocalyptic number.

65397021879 is a deficient number, since it is larger than the sum of its proper divisors (34290003273).

65397021879 is a wasteful number, since it uses less digits than its factorization.

65397021879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075646.

The product of its (nonzero) digits is 5715360, while the sum is 57.

The spelling of 65397021879 in words is "sixty-five billion, three hundred ninety-seven million, twenty-one thousand, eight hundred seventy-nine".