64263656 has 32 divisors (see below), whose sum is σ = 127353600. Its totient is φ = 30338880.

The previous prime is 64263611. The next prime is 64263659. The reversal of 64263656 is 65636246.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64263659) 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, 12326 + ... + 16746.

It is an arithmetic number, because the mean of its divisors is an integer number (3979800).

Almost surely, 2^64263656 is an apocalyptic number.

It is an amenable number.

64263656 is a deficient number, since it is larger than the sum of its proper divisors (63089944).

64263656 is a wasteful number, since it uses less digits than its factorization.

64263656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4529 (or 4525 counting only the distinct ones).

The product of its digits is 155520, while the sum is 38.

The square root of 64263656 is about 8016.4615635578. The cubic root of 64263656 is about 400.5485307745.

The spelling of 64263656 in words is "sixty-four million, two hundred sixty-three thousand, six hundred fifty-six".