61590564 has 96 divisors (see below), whose sum is σ = 183778560. Its totient is φ = 17473536.

The previous prime is 61590563. The next prime is 61590587. The reversal of 61590564 is 46509516.

61590564 is a `hidden beast` number, since 6 + 1 + 5 + 90 + 564 = 666.

61590564 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 not an unprimeable number, because it can be changed into a prime (61590563) 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 31 ways as a sum of consecutive naturals, for example, 194134 + ... + 194450.

It is an arithmetic number, because the mean of its divisors is an integer number (1914360).

Almost surely, 2^61590564 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 61590564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91889280).

61590564 is an abundant number, since it is smaller than the sum of its proper divisors (122187996).

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

61590564 is a wasteful number, since it uses less digits than its factorization.

61590564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 586 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 61590564 is about 7847.9655962549. The cubic root of 61590564 is about 394.9159977328.

The spelling of 61590564 in words is "sixty-one million, five hundred ninety thousand, five hundred sixty-four".