656465472 has 336 divisors, whose sum is σ = 2236695552. Its totient is φ = 189112320.

The previous prime is 656465449. The next prime is 656465479. The reversal of 656465472 is 274564656.

656465472 is a `hidden beast` number, since 65 + 6 + 46 + 547 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (656465479) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3436897 + ... + 3437087.

It is an arithmetic number, because the mean of its divisors is an integer number (6656832).

Almost surely, 2^656465472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656465472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1118347776).

656465472 is an abundant number, since it is smaller than the sum of its proper divisors (1580230080).

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

656465472 is a wasteful number, since it uses less digits than its factorization.

656465472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 226 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The square root of 656465472 is about 25621.5821525526. The cubic root of 656465472 is about 869.1017602000.

The spelling of 656465472 in words is "six hundred fifty-six million, four hundred sixty-five thousand, four hundred seventy-two".