2256865300637 has 2 divisors, whose sum is σ = 2256865300638. Its totient is φ = 2256865300636.

The previous prime is 2256865300633. The next prime is 2256865300643. The reversal of 2256865300637 is 7360035686522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2219417632441 + 37447668196 = 1489771^2 + 193514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256865300637 - 2² = 2256865300633 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256865300631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128432650318 + 1128432650319.

It is an arithmetic number, because the mean of its divisors is an integer number (1128432650319).

Almost surely, 2^{2256865300637} is an apocalyptic number.

It is an amenable number.

2256865300637 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256865300637 is an equidigital number, since it uses as much as digits as its factorization.

2256865300637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 2256865300637 in words is "two trillion, two hundred fifty-six billion, eight hundred sixty-five million, three hundred thousand, six hundred thirty-seven".