61564612 has 24 divisors (see below), whose sum is σ = 110023200. Its totient is φ = 30134016.

The previous prime is 61564609. The next prime is 61564619. The reversal of 61564612 is 21646516.

It is not an unprimeable number, because it can be changed into a prime (61564619) 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, 82939 + ... + 83677.

It is an arithmetic number, because the mean of its divisors is an integer number (4584300).

Almost surely, 2^61564612 is an apocalyptic number.

It is an amenable number.

61564612 is a deficient number, since it is larger than the sum of its proper divisors (48458588).

61564612 is a wasteful number, since it uses less digits than its factorization.

61564612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1153 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 61564612 is about 7846.3119999144. The cubic root of 61564612 is about 394.8605222447.

The spelling of 61564612 in words is "sixty-one million, five hundred sixty-four thousand, six hundred twelve".