2561796880199 has 16 divisors (see below), whose sum is σ = 2605380499680. Its totient is φ = 2518546504320.

The previous prime is 2561796880183. The next prime is 2561796880241. The reversal of 2561796880199 is 9910886971652.

It is a cyclic number.

It is not a de Polignac number, because 2561796880199 - 2⁴ = 2561796880183 is a prime.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561796180199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13780037 + ... + 13964705.

It is an arithmetic number, because the mean of its divisors is an integer number (162836281230).

Almost surely, 2^{2561796880199} is an apocalyptic number.

2561796880199 is a deficient number, since it is larger than the sum of its proper divisors (43583619481).

2561796880199 is a wasteful number, since it uses less digits than its factorization.

2561796880199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185570.

The product of its (nonzero) digits is 117573120, while the sum is 71.

The spelling of 2561796880199 in words is "two trillion, five hundred sixty-one billion, seven hundred ninety-six million, eight hundred eighty thousand, one hundred ninety-nine".