864556450 has 12 divisors (see below), whose sum is σ = 1608075090. Its totient is φ = 345822560.

The previous prime is 864556423. The next prime is 864556507. The reversal of 864556450 is 54655468.

It can be written as a sum of positive squares in 3 ways, for example, as 436935409 + 427621041 = 20903^2 + 20679^2 .

It is a junction number, because it is equal to n+sod(n) for n = 864556397 and 864556406.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8645515 + ... + 8645614.

Almost surely, 2^864556450 is an apocalyptic number.

864556450 is a deficient number, since it is larger than the sum of its proper divisors (743518640).

864556450 is a wasteful number, since it uses less digits than its factorization.

864556450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17291141 (or 17291136 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 43.

The square root of 864556450 is about 29403.3407965830. The cubic root of 864556450 is about 952.6450570500.

The spelling of 864556450 in words is "eight hundred sixty-four million, five hundred fifty-six thousand, four hundred fifty".