2561617261676 has 24 divisors (see below), whose sum is σ = 4915184407056. Its totient is φ = 1158460963520.

The previous prime is 2561617261613. The next prime is 2561617261681. The reversal of 2561617261676 is 6761627161652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147754211 + ... + 147771546.

It is an arithmetic number, because the mean of its divisors is an integer number (204799350294).

Almost surely, 2^{2561617261676} is an apocalyptic number.

It is an amenable number.

2561617261676 is a deficient number, since it is larger than the sum of its proper divisors (2353567145380).

2561617261676 is a wasteful number, since it uses less digits than its factorization.

2561617261676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295525969 (or 295525967 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 56.

The spelling of 2561617261676 in words is "two trillion, five hundred sixty-one billion, six hundred seventeen million, two hundred sixty-one thousand, six hundred seventy-six".