864479397599 has 4 divisors (see below), whose sum is σ = 866354624520. Its totient is φ = 862604170680.

The previous prime is 864479397589. The next prime is 864479397619. The reversal of 864479397599 is 995793974468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 864479397599 - 2²⁰ = 864478349023 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 (864479397569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937612769 + ... + 937613690.

It is an arithmetic number, because the mean of its divisors is an integer number (216588656130).

Almost surely, 2^864479397599 is an apocalyptic number.

864479397599 is a deficient number, since it is larger than the sum of its proper divisors (1875226921).

864479397599 is a wasteful number, since it uses less digits than its factorization.

864479397599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875226920.

The product of its digits is 3703553280, while the sum is 80.

The spelling of 864479397599 in words is "eight hundred sixty-four billion, four hundred seventy-nine million, three hundred ninety-seven thousand, five hundred ninety-nine".