656561148 has 24 divisors (see below), whose sum is σ = 1622092752. Its totient is φ = 205979904.

The previous prime is 656561141. The next prime is 656561153. The reversal of 656561148 is 841165656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656561141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1609015 + ... + 1609422.

It is an arithmetic number, because the mean of its divisors is an integer number (67587198).

Almost surely, 2^656561148 is an apocalyptic number.

656561148 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

656561148 is an abundant number, since it is smaller than the sum of its proper divisors (965531604).

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

656561148 is a wasteful number, since it uses less digits than its factorization.

656561148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218461 (or 3218459 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 656561148 is about 25623.4491823408. The cubic root of 656561148 is about 869.1439803137.

The spelling of 656561148 in words is "six hundred fifty-six million, five hundred sixty-one thousand, one hundred forty-eight".