61415564 has 12 divisors (see below), whose sum is σ = 122831184. Its totient is φ = 26320944.

The previous prime is 61415527. The next prime is 61415573. The reversal of 61415564 is 46551416.

61415564 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61415564.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1096679 + ... + 1096734.

It is an arithmetic number, because the mean of its divisors is an integer number (10235932).

Almost surely, 2^61415564 is an apocalyptic number.

It is an amenable number.

61415564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61415564 is a wasteful number, since it uses less digits than its factorization.

61415564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193424 (or 2193422 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 61415564 is about 7836.8082788850. The cubic root of 61415564 is about 394.5416121451.

The spelling of 61415564 in words is "sixty-one million, four hundred fifteen thousand, five hundred sixty-four".