656281249 has 32 divisors (see below), whose sum is σ = 743702400. Its totient is φ = 578710080.

The previous prime is 656281229. The next prime is 656281271. The reversal of 656281249 is 942182656.

It is not a de Polignac number, because 656281249 - 2¹⁷ = 656150177 is a prime.

It is a Duffinian number.

Its product of digits (207360) is a multiple of the sum of its prime divisors (216).

It is not an unprimeable number, because it can be changed into a prime (656281229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7906962 + ... + 7907044.

It is an arithmetic number, because the mean of its divisors is an integer number (23240700).

Almost surely, 2^656281249 is an apocalyptic number.

It is an amenable number.

656281249 is a deficient number, since it is larger than the sum of its proper divisors (87421151).

656281249 is an equidigital number, since it uses as much as digits as its factorization.

656281249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 216 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 656281249 is about 25617.9868256661. The cubic root of 656281249 is about 869.0204543178.

The spelling of 656281249 in words is "six hundred fifty-six million, two hundred eighty-one thousand, two hundred forty-nine".