61605204 has 24 divisors (see below), whose sum is σ = 146183520. Its totient is φ = 20186784.

The previous prime is 61605199. The next prime is 61605223. The reversal of 61605204 is 40250616.

61605204 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

61605204 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42799 + ... + 44214.

It is an arithmetic number, because the mean of its divisors is an integer number (6090980).

Almost surely, 2^61605204 is an apocalyptic number.

It is an amenable number.

61605204 is an abundant number, since it is smaller than the sum of its proper divisors (84578316).

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

61605204 is a wasteful number, since it uses less digits than its factorization.

61605204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87079 (or 87077 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 61605204 is about 7848.8982666359. The cubic root of 61605204 is about 394.9472856001.

The spelling of 61605204 in words is "sixty-one million, six hundred five thousand, two hundred four".