656191452 has 96 divisors (see below), whose sum is σ = 1791401472. Its totient is φ = 183085056.

The previous prime is 656191433. The next prime is 656191513. The reversal of 656191452 is 254191656.

It is a self number, because there is not a number n which added to its sum of digits gives 656191452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 692443 + ... + 693389.

It is an arithmetic number, because the mean of its divisors is an integer number (18660432).

Almost surely, 2^656191452 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 656191452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895700736).

656191452 is an abundant number, since it is smaller than the sum of its proper divisors (1135210020).

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

656191452 is a wasteful number, since it uses less digits than its factorization.

656191452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1145 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 656191452 is about 25616.2341494608. The cubic root of 656191452 is about 868.9808173536.

The spelling of 656191452 in words is "six hundred fifty-six million, one hundred ninety-one thousand, four hundred fifty-two".