2560639619 has 2 divisors, whose sum is σ = 2560639620. Its totient is φ = 2560639618.

The previous prime is 2560639607. The next prime is 2560639661. The reversal of 2560639619 is 9169360652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2560639619 is a prime.

It is a super-2 number, since 2×2560639619² = 13113750516784930322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2560629619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280319809 + 1280319810.

It is an arithmetic number, because the mean of its divisors is an integer number (1280319810).

Almost surely, 2^2560639619 is an apocalyptic number.

2560639619 is a deficient number, since it is larger than the sum of its proper divisors (1).

2560639619 is an equidigital number, since it uses as much as digits as its factorization.

2560639619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 2560639619 is about 50602.7629581627. The cubic root of 2560639619 is about 1368.0946783859.

The spelling of 2560639619 in words is "two billion, five hundred sixty million, six hundred thirty-nine thousand, six hundred nineteen".