64769479639 has 8 divisors (see below), whose sum is σ = 68219331840. Its totient is φ = 61323720696.

The previous prime is 64769479637. The next prime is 64769479651. The reversal of 64769479639 is 93697496746.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64769479639 - 2¹ = 64769479637 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 (64769479637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990799 + ... + 1054144.

It is an arithmetic number, because the mean of its divisors is an integer number (8527416480).

Almost surely, 2^64769479639 is an apocalyptic number.

64769479639 is a deficient number, since it is larger than the sum of its proper divisors (3449852201).

64769479639 is a wasteful number, since it uses less digits than its factorization.

64769479639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046629.

The product of its digits is 370355328, while the sum is 70.

The spelling of 64769479639 in words is "sixty-four billion, seven hundred sixty-nine million, four hundred seventy-nine thousand, six hundred thirty-nine".