656518353263 has 4 divisors (see below), whose sum is σ = 657300855120. Its totient is φ = 655735851408.

The previous prime is 656518353259. The next prime is 656518353299. The reversal of 656518353263 is 362353815656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 656518353263 - 2² = 656518353259 is a prime.

It is a super-2 number, since 2×656518353263² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656518353223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391249670 + ... + 391251347.

It is an arithmetic number, because the mean of its divisors is an integer number (164325213780).

Almost surely, 2^656518353263 is an apocalyptic number.

656518353263 is a deficient number, since it is larger than the sum of its proper divisors (782501857).

656518353263 is an equidigital number, since it uses as much as digits as its factorization.

656518353263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782501856.

The product of its digits is 11664000, while the sum is 53.

The spelling of 656518353263 in words is "six hundred fifty-six billion, five hundred eighteen million, three hundred fifty-three thousand, two hundred sixty-three".