2561413982143 has 4 divisors (see below), whose sum is σ = 2561421830608. Its totient is φ = 2561406133680.

The previous prime is 2561413982129. The next prime is 2561413982213. The reversal of 2561413982143 is 3412893141652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2561413982143 - 2⁹ = 2561413981631 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 (2561413986143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3412446 + ... + 4094827.

It is an arithmetic number, because the mean of its divisors is an integer number (640355457652).

Almost surely, 2^{2561413982143} is an apocalyptic number.

2561413982143 is a deficient number, since it is larger than the sum of its proper divisors (7848465).

2561413982143 is an equidigital number, since it uses as much as digits as its factorization.

2561413982143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7848464.

The product of its digits is 1244160, while the sum is 49.

The spelling of 2561413982143 in words is "two trillion, five hundred sixty-one billion, four hundred thirteen million, nine hundred eighty-two thousand, one hundred forty-three".