864758816 has 24 divisors (see below), whose sum is σ = 1727908560. Its totient is φ = 425924928.

The previous prime is 864758809. The next prime is 864758819. The reversal of 864758816 is 618857468.

It is not an unprimeable number, because it can be changed into a prime (864758819) 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, 199526 + ... + 203813.

It is an arithmetic number, because the mean of its divisors is an integer number (71996190).

Almost surely, 2^864758816 is an apocalyptic number.

It is an amenable number.

864758816 is a deficient number, since it is larger than the sum of its proper divisors (863149744).

864758816 is a wasteful number, since it uses less digits than its factorization.

864758816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403416 (or 403408 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 53.

The square root of 864758816 is about 29406.7818028427. The cubic root of 864758816 is about 952.7193795268.

The spelling of 864758816 in words is "eight hundred sixty-four million, seven hundred fifty-eight thousand, eight hundred sixteen".