656565432 has 64 divisors (see below), whose sum is σ = 1741266720. Its totient is φ = 205590528.

The previous prime is 656565401. The next prime is 656565433. The reversal of 656565432 is 234565656.

656565432 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656565433) 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 15 ways as a sum of consecutive naturals, for example, 275028 + ... + 277404.

Almost surely, 2^656565432 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 656565432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870633360).

656565432 is an abundant number, since it is smaller than the sum of its proper divisors (1084701288).

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

656565432 is a wasteful number, since it uses less digits than its factorization.

656565432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080 (or 3076 counting only the distinct ones).

The product of its digits is 648000, while the sum is 42.

The square root of 656565432 is about 25623.5327775075. The cubic root of 656565432 is about 869.1458706706.

The spelling of 656565432 in words is "six hundred fifty-six million, five hundred sixty-five thousand, four hundred thirty-two".