656872485 has 16 divisors (see below), whose sum is σ = 1084899840. Its totient is φ = 339030720.

The previous prime is 656872483. The next prime is 656872487. The reversal of 656872485 is 584278656.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (656872483) and next prime (656872487).

It is not a de Polignac number, because 656872485 - 2¹ = 656872483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656872483) 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, 705850 + ... + 706779.

It is an arithmetic number, because the mean of its divisors is an integer number (67806240).

Almost surely, 2^656872485 is an apocalyptic number.

It is an amenable number.

656872485 is a deficient number, since it is larger than the sum of its proper divisors (428027355).

656872485 is a wasteful number, since it uses less digits than its factorization.

656872485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412668.

The product of its digits is 3225600, while the sum is 51.

The square root of 656872485 is about 25629.5236982664. The cubic root of 656872485 is about 869.2813394004.

The spelling of 656872485 in words is "six hundred fifty-six million, eight hundred seventy-two thousand, four hundred eighty-five".