656406552 has 32 divisors (see below), whose sum is σ = 1646311680. Its totient is φ = 218096160.

The previous prime is 656406551. The next prime is 656406557. The reversal of 656406552 is 255604656.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 656406552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656406551) 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, 36508 + ... + 51435.

It is an arithmetic number, because the mean of its divisors is an integer number (51447240).

Almost surely, 2^656406552 is an apocalyptic number.

It is an amenable number.

656406552 is an abundant number, since it is smaller than the sum of its proper divisors (989905128).

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

656406552 is a wasteful number, since it uses less digits than its factorization.

656406552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88263 (or 88259 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 656406552 is about 25620.4323148537. The cubic root of 656406552 is about 869.0757578129.

The spelling of 656406552 in words is "six hundred fifty-six million, four hundred six thousand, five hundred fifty-two".