2560220749 has 2 divisors, whose sum is σ = 2560220750. Its totient is φ = 2560220748.

The previous prime is 2560220713. The next prime is 2560220753. The reversal of 2560220749 is 9470220652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1287015625 + 1273205124 = 35875^2 + 35682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2560220749 is a prime.

It is a super-2 number, since 2×2560220749² = 13109460567220242002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2560220149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280110374 + 1280110375.

It is an arithmetic number, because the mean of its divisors is an integer number (1280110375).

Almost surely, 2^2560220749 is an apocalyptic number.

It is an amenable number.

2560220749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2560220749 is an equidigital number, since it uses as much as digits as its factorization.

2560220749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 2560220749 is about 50598.6239832666. The cubic root of 2560220749 is about 1368.0200765737.

The spelling of 2560220749 in words is "two billion, five hundred sixty million, two hundred twenty thousand, seven hundred forty-nine".