656256523 has 8 divisors (see below), whose sum is σ = 743934800. Its totient is φ = 573892128.

The previous prime is 656256509. The next prime is 656256551. The reversal of 656256523 is 325652656.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656256523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656256553) 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, 1328208 + ... + 1328701.

It is an arithmetic number, because the mean of its divisors is an integer number (92991850).

Almost surely, 2^656256523 is an apocalyptic number.

656256523 is a deficient number, since it is larger than the sum of its proper divisors (87678277).

656256523 is a wasteful number, since it uses less digits than its factorization.

656256523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656941.

The product of its digits is 324000, while the sum is 40.

The square root of 656256523 is about 25617.5042305061. The cubic root of 656256523 is about 869.0095404656.

The spelling of 656256523 in words is "six hundred fifty-six million, two hundred fifty-six thousand, five hundred twenty-three".