656504112 has 160 divisors (see below), whose sum is σ = 2011299840. Its totient is φ = 182304000.

The previous prime is 656504099. The next prime is 656504119. The reversal of 656504112 is 211405656.

It is a self number, because there is not a number n which added to its sum of digits gives 656504112.

It is not an unprimeable number, because it can be changed into a prime (656504119) 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 31 ways as a sum of consecutive naturals, for example, 309937 + ... + 312047.

It is an arithmetic number, because the mean of its divisors is an integer number (12570624).

Almost surely, 2^656504112 is an apocalyptic number.

656504112 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656504112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005649920).

656504112 is an abundant number, since it is smaller than the sum of its proper divisors (1354795728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656504112 is a wasteful number, since it uses less digits than its factorization.

656504112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183 (or 2177 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 656504112 is about 25622.3361932514. The cubic root of 656504112 is about 869.1188118371.

Adding to 656504112 its reverse (211405656), we get a palindrome (867909768).

The spelling of 656504112 in words is "six hundred fifty-six million, five hundred four thousand, one hundred twelve".