656220546 has 24 divisors (see below), whose sum is σ = 1422449964. Its totient is φ = 218641920.

The previous prime is 656220541. The next prime is 656220569. The reversal of 656220546 is 645022656.

It can be written as a sum of positive squares in 2 ways, for example, as 652240521 + 3980025 = 25539^2 + 1995^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 656220546.

It is not an unprimeable number, because it can be changed into a prime (656220541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40966 + ... + 54686.

Almost surely, 2^656220546 is an apocalyptic number.

656220546 is an abundant number, since it is smaller than the sum of its proper divisors (766229418).

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

656220546 is a wasteful number, since it uses less digits than its factorization.

656220546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16386 (or 16383 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 656220546 is about 25616.8020252334. The cubic root of 656220546 is about 868.9936600254.

The spelling of 656220546 in words is "six hundred fifty-six million, two hundred twenty thousand, five hundred forty-six".