2257600861 has 2 divisors, whose sum is σ = 2257600862. Its totient is φ = 2257600860.

The previous prime is 2257600859. The next prime is 2257600883. The reversal of 2257600861 is 1680067522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2247328836 + 10272025 = 47406^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257600861 - 2¹ = 2257600859 is a prime.

Together with 2257600859, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2257600861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2257600801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128800430 + 1128800431.

It is an arithmetic number, because the mean of its divisors is an integer number (1128800431).

Almost surely, 2^2257600861 is an apocalyptic number.

It is an amenable number.

2257600861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257600861 is an equidigital number, since it uses as much as digits as its factorization.

2257600861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 2257600861 is about 47514.2174617240. The cubic root of 2257600861 is about 1311.8445861559.

The spelling of 2257600861 in words is "two billion, two hundred fifty-seven million, six hundred thousand, eight hundred sixty-one".