61655564 has 12 divisors (see below), whose sum is σ = 108463488. Its totient is φ = 30666000.

The previous prime is 61655563. The next prime is 61655591. The reversal of 61655564 is 46555616.

It is not an unprimeable number, because it can be changed into a prime (61655563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39587 + ... + 41114.

It is an arithmetic number, because the mean of its divisors is an integer number (9038624).

Almost surely, 2^61655564 is an apocalyptic number.

It is an amenable number.

61655564 is a deficient number, since it is larger than the sum of its proper divisors (46807924).

61655564 is a wasteful number, since it uses less digits than its factorization.

61655564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80896 (or 80894 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The square root of 61655564 is about 7852.1057048412. The cubic root of 61655564 is about 395.0548746067.

The spelling of 61655564 in words is "sixty-one million, six hundred fifty-five thousand, five hundred sixty-four".