656854144 has 16 divisors (see below), whose sum is σ = 1308576870. Its totient is φ = 328427008.

The previous prime is 656854141. The next prime is 656854181. The reversal of 656854144 is 441458656.

It can be written as a sum of positive squares in only one way, i.e., 552814144 + 104040000 = 23512^2 + 10200^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 656854144.

It is not an unprimeable number, because it can be changed into a prime (656854141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2565709 + ... + 2565964.

Almost surely, 2^656854144 is an apocalyptic number.

656854144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

656854144 is a deficient number, since it is larger than the sum of its proper divisors (651722726).

656854144 is an equidigital number, since it uses as much as digits as its factorization.

656854144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131687 (or 5131675 counting only the distinct ones).

The product of its digits is 460800, while the sum is 43.

The square root of 656854144 is about 25629.1658857638. The cubic root of 656854144 is about 869.2732487193.

The spelling of 656854144 in words is "six hundred fifty-six million, eight hundred fifty-four thousand, one hundred forty-four".