61604949 has 16 divisors (see below), whose sum is σ = 94371840. Its totient is φ = 35016240.

The previous prime is 61604941. The next prime is 61604953. The reversal of 61604949 is 94940616.

It is not a de Polignac number, because 61604949 - 2³ = 61604941 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61604941) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3669 + ... + 11690.

It is an arithmetic number, because the mean of its divisors is an integer number (5898240).

Almost surely, 2^61604949 is an apocalyptic number.

It is an amenable number.

61604949 is a deficient number, since it is larger than the sum of its proper divisors (32766891).

61604949 is a wasteful number, since it uses less digits than its factorization.

61604949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15560.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 61604949 is about 7848.8820223010. The cubic root of 61604949 is about 394.9467406694.

The spelling of 61604949 in words is "sixty-one million, six hundred four thousand, nine hundred forty-nine".