61565256 has 48 divisors (see below), whose sum is σ = 172124160. Its totient is φ = 19859040.

The previous prime is 61565243. The next prime is 61565291. The reversal of 61565256 is 65256516.

It is a happy number.

61565256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 61565256.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 11560 + ... + 16023.

It is an arithmetic number, because the mean of its divisors is an integer number (3585920).

Almost surely, 2^61565256 is an apocalyptic number.

It is an amenable number.

61565256 is an abundant number, since it is smaller than the sum of its proper divisors (110558904).

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

61565256 is a wasteful number, since it uses less digits than its factorization.

61565256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27626 (or 27619 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 61565256 is about 7846.3530381955. The cubic root of 61565256 is about 394.8618990599.

The spelling of 61565256 in words is "sixty-one million, five hundred sixty-five thousand, two hundred fifty-six".