2561677245399 has 8 divisors (see below), whose sum is σ = 3450781719280. Its totient is φ = 1690178800896.

The previous prime is 2561677245377. The next prime is 2561677245431. The reversal of 2561677245399 is 9935427761652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2561677245399 - 2¹⁵ = 2561677212631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561677245329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4401507004 + ... + 4401507585.

It is an arithmetic number, because the mean of its divisors is an integer number (431347714910).

Almost surely, 2^{2561677245399} is an apocalyptic number.

2561677245399 is a deficient number, since it is larger than the sum of its proper divisors (889104473881).

2561677245399 is an equidigital number, since it uses as much as digits as its factorization.

2561677245399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8803014689.

The product of its digits is 171460800, while the sum is 66.

The spelling of 2561677245399 in words is "two trillion, five hundred sixty-one billion, six hundred seventy-seven million, two hundred forty-five thousand, three hundred ninety-nine".