61604655 has 16 divisors (see below), whose sum is σ = 112648704. Its totient is φ = 28162080.

The previous prime is 61604633. The next prime is 61604659. The reversal of 61604655 is 55640616.

61604655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61604655 - 2⁸ = 61604399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61604659) 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 15 ways as a sum of consecutive naturals, for example, 293251 + ... + 293460.

It is an arithmetic number, because the mean of its divisors is an integer number (7040544).

Almost surely, 2^61604655 is an apocalyptic number.

61604655 is a deficient number, since it is larger than the sum of its proper divisors (51044049).

61604655 is a wasteful number, since it uses less digits than its factorization.

61604655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586726.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 61604655 is about 7848.8632934967. The cubic root of 61604655 is about 394.9461123945.

The spelling of 61604655 in words is "sixty-one million, six hundred four thousand, six hundred fifty-five".