653563968 has 56 divisors (see below), whose sum is σ = 1734299808. Its totient is φ = 217214976.

The previous prime is 653563931. The next prime is 653563969. The reversal of 653563968 is 869365356.

It is a self number, because there is not a number n which added to its sum of digits gives 653563968.

It is not an unprimeable number, because it can be changed into a prime (653563969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62955 + ... + 72597.

Almost surely, 2^653563968 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 653563968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867149904).

653563968 is an abundant number, since it is smaller than the sum of its proper divisors (1080735840).

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

653563968 is a wasteful number, since it uses less digits than its factorization.

653563968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10011 (or 10001 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 51.

The square root of 653563968 is about 25564.8971834428. The cubic root of 653563968 is about 867.8194248729.

The spelling of 653563968 in words is "six hundred fifty-three million, five hundred sixty-three thousand, nine hundred sixty-eight".