864449938564 has 9 divisors (see below), whose sum is σ = 1512790646647. Its totient is φ = 432224039524.

The previous prime is 864449938519. The next prime is 864449938567. The reversal of 864449938564 is 465839944468.

The square root of 864449938564 is 929758.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 864449938493 and 864449938502.

It is not an unprimeable number, because it can be changed into a prime (864449938567) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1627077 + ... + 2091955.

Almost surely, 2^864449938564 is an apocalyptic number.

864449938564 is the 929758-th square number.

It is an amenable number.

864449938564 is a deficient number, since it is larger than the sum of its proper divisors (648340708083).

864449938564 is an frugal number, since it uses more digits than its factorization.

864449938564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929762 (or 464881 counting only the distinct ones).

The product of its digits is 716636160, while the sum is 70.

The spelling of 864449938564 in words is "eight hundred sixty-four billion, four hundred forty-nine million, nine hundred thirty-eight thousand, five hundred sixty-four".