61613204564 has 12 divisors (see below), whose sum is σ = 107833357044. Its totient is φ = 30803673984.

The previous prime is 61613204557. The next prime is 61613204591. The reversal of 61613204564 is 46540231616.

61613204564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 550840900 + 61062363664 = 23470^2 + 247108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684389 + ... + 769164.

It is an arithmetic number, because the mean of its divisors is an integer number (8986113087).

Almost surely, 2^61613204564 is an apocalyptic number.

It is an amenable number.

61613204564 is a deficient number, since it is larger than the sum of its proper divisors (46220152480).

61613204564 is a wasteful number, since it uses less digits than its factorization.

61613204564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464154 (or 1464152 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 61613204564 in words is "sixty-one billion, six hundred thirteen million, two hundred four thousand, five hundred sixty-four".