653790864 has 40 divisors (see below), whose sum is σ = 1706383840. Its totient is φ = 215682048.

The previous prime is 653790853. The next prime is 653790871. The reversal of 653790864 is 468097356.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65554 + ... + 74865.

It is an arithmetic number, because the mean of its divisors is an integer number (42659596).

Almost surely, 2^653790864 is an apocalyptic number.

It is an amenable number.

653790864 is an abundant number, since it is smaller than the sum of its proper divisors (1052592976).

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

653790864 is a wasteful number, since it uses less digits than its factorization.

653790864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140527 (or 140521 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 653790864 is about 25569.3344457770. The cubic root of 653790864 is about 867.9198394122.

The spelling of 653790864 in words is "six hundred fifty-three million, seven hundred ninety thousand, eight hundred sixty-four".