865513648 has 20 divisors (see below), whose sum is σ = 1712613600. Its totient is φ = 423548864.

The previous prime is 865513633. The next prime is 865513681. The reversal of 865513648 is 846315568.

It is a super-2 number, since 2×865513648² = 1498227749748535808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 865513598 and 865513607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574723 + ... + 576226.

It is an arithmetic number, because the mean of its divisors is an integer number (85630680).

Almost surely, 2^865513648 is an apocalyptic number.

It is an amenable number.

865513648 is a deficient number, since it is larger than the sum of its proper divisors (847099952).

865513648 is a wasteful number, since it uses less digits than its factorization.

865513648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151004 (or 1150998 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 865513648 is about 29419.6133217281. The cubic root of 865513648 is about 952.9965026277.

The spelling of 865513648 in words is "eight hundred sixty-five million, five hundred thirteen thousand, six hundred forty-eight".