2601664556 has 24 divisors (see below), whose sum is σ = 4573666944. Its totient is φ = 1294917120.

The previous prime is 2601664523. The next prime is 2601664609. The reversal of 2601664556 is 6554661062.

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, 1002821 + ... + 1005411.

It is an arithmetic number, because the mean of its divisors is an integer number (190569456).

Almost surely, 2^2601664556 is an apocalyptic number.

It is an amenable number.

2601664556 is a deficient number, since it is larger than the sum of its proper divisors (1972002388).

2601664556 is a wasteful number, since it uses less digits than its factorization.

2601664556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641 (or 3639 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 2601664556 is about 51006.5148387929. The cubic root of 2601664556 is about 1375.3622505164.

The spelling of 2601664556 in words is "two billion, six hundred one million, six hundred sixty-four thousand, five hundred fifty-six".