656642253 has 8 divisors (see below), whose sum is σ = 875685600. Its totient is φ = 437680208.

The previous prime is 656642251. The next prime is 656642257. The reversal of 656642253 is 352246656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 656642253 - 2¹ = 656642251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656642251) 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, 2038 + ... + 36296.

It is an arithmetic number, because the mean of its divisors is an integer number (109460700).

Almost surely, 2^656642253 is an apocalyptic number.

It is an amenable number.

656642253 is a deficient number, since it is larger than the sum of its proper divisors (219043347).

656642253 is a wasteful number, since it uses less digits than its factorization.

656642253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40651.

The product of its digits is 259200, while the sum is 39.

The square root of 656642253 is about 25625.0317658340. The cubic root of 656642253 is about 869.1797672927.

The spelling of 656642253 in words is "six hundred fifty-six million, six hundred forty-two thousand, two hundred fifty-three".