2561749031119 has 2 divisors, whose sum is σ = 2561749031120. Its totient is φ = 2561749031118.

The previous prime is 2561749031117. The next prime is 2561749031183. The reversal of 2561749031119 is 9111309471652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2561749031119 - 2¹ = 2561749031117 is a prime.

It is a super-2 number, since 2×2561749031119² (a number of 26 digits) contains 22 as substring.

Together with 2561749031117, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2561749031117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280874515559 + 1280874515560.

It is an arithmetic number, because the mean of its divisors is an integer number (1280874515560).

Almost surely, 2^{2561749031119} is an apocalyptic number.

2561749031119 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561749031119 is an equidigital number, since it uses as much as digits as its factorization.

2561749031119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 2561749031119 in words is "two trillion, five hundred sixty-one billion, seven hundred forty-nine million, thirty-one thousand, one hundred nineteen".