653326864 has 80 divisors (see below), whose sum is σ = 1390036032. Its totient is φ = 296239104.

The previous prime is 653326853. The next prime is 653326873. The reversal of 653326864 is 468623356.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 653326864.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 970432 + ... + 971104.

Almost surely, 2^653326864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 653326864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695018016).

653326864 is an abundant number, since it is smaller than the sum of its proper divisors (736709168).

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

653326864 is a wasteful number, since it uses less digits than its factorization.

653326864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 818 counting only the distinct ones).

The product of its digits is 622080, while the sum is 43.

The square root of 653326864 is about 25560.2594666017. The cubic root of 653326864 is about 867.7144678706.

The spelling of 653326864 in words is "six hundred fifty-three million, three hundred twenty-six thousand, eight hundred sixty-four".