2561952907 has 2 divisors, whose sum is σ = 2561952908. Its totient is φ = 2561952906.

The previous prime is 2561952863. The next prime is 2561952919. The reversal of 2561952907 is 7092591652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2561952907 - 2²⁷ = 2427735179 is a prime.

It is not a weakly prime, because it can be changed into another prime (2561952997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280976453 + 1280976454.

It is an arithmetic number, because the mean of its divisors is an integer number (1280976454).

Almost surely, 2^2561952907 is an apocalyptic number.

2561952907 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561952907 is an equidigital number, since it uses as much as digits as its factorization.

2561952907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 2561952907 is about 50615.7377403511. The cubic root of 2561952907 is about 1368.3285255904.

The spelling of 2561952907 in words is "two billion, five hundred sixty-one million, nine hundred fifty-two thousand, nine hundred seven".