2661613604 has 12 divisors (see below), whose sum is σ = 5016118044. Its totient is φ = 1228437024.

The previous prime is 2661613597. The next prime is 2661613607. The reversal of 2661613604 is 4063161662.

It can be written as a sum of positive squares in 2 ways, for example, as 960876004 + 1700737600 = 30998^2 + 41240^2 .

It is not an unprimeable number, because it can be changed into a prime (2661613607) 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 3 ways as a sum of consecutive naturals, for example, 25592387 + ... + 25592490.

It is an arithmetic number, because the mean of its divisors is an integer number (418009837).

Almost surely, 2^2661613604 is an apocalyptic number.

It is an amenable number.

2661613604 is a deficient number, since it is larger than the sum of its proper divisors (2354504440).

2661613604 is a wasteful number, since it uses less digits than its factorization.

2661613604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51184894 (or 51184892 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 2661613604 is about 51590.8286810747. The cubic root of 2661613604 is about 1385.8460953788.

The spelling of 2661613604 in words is "two billion, six hundred sixty-one million, six hundred thirteen thousand, six hundred four".