656855109 has 16 divisors (see below), whose sum is σ = 973569600. Its totient is φ = 437700528.

The previous prime is 656855093. The next prime is 656855113. The reversal of 656855109 is 901558656.

It is a happy number.

656855109 is a `hidden beast` number, since 6 + 56 + 85 + 510 + 9 = 666.

It is not a de Polignac number, because 656855109 - 2⁴ = 656855093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656855119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74362 + ... + 82724.

It is an arithmetic number, because the mean of its divisors is an integer number (60848100).

Almost surely, 2^656855109 is an apocalyptic number.

It is an amenable number.

656855109 is a deficient number, since it is larger than the sum of its proper divisors (316714491).

656855109 is a wasteful number, since it uses less digits than its factorization.

656855109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11281 (or 11275 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 656855109 is about 25629.1847119646. The cubic root of 656855109 is about 869.2736744091.

The spelling of 656855109 in words is "six hundred fifty-six million, eight hundred fifty-five thousand, one hundred nine".