864496864 has 48 divisors (see below), whose sum is σ = 2121952896. Its totient is φ = 336816000.

The previous prime is 864496861. The next prime is 864496877. The reversal of 864496864 is 468694468.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864496861) 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, 172962 + ... + 177889.

It is an arithmetic number, because the mean of its divisors is an integer number (44207352).

Almost surely, 2^864496864 is an apocalyptic number.

It is an amenable number.

864496864 is an abundant number, since it is smaller than the sum of its proper divisors (1257456032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864496864 is a wasteful number, since it uses less digits than its factorization.

864496864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350879 (or 350871 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 55.

The square root of 864496864 is about 29402.3275269153. The cubic root of 864496864 is about 952.6231708321.

The spelling of 864496864 in words is "eight hundred sixty-four million, four hundred ninety-six thousand, eight hundred sixty-four".