2256323650457 has 2 divisors, whose sum is σ = 2256323650458. Its totient is φ = 2256323650456.

The previous prime is 2256323650433. The next prime is 2256323650499. The reversal of 2256323650457 is 7540563236522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1258410560521 + 997913089936 = 1121789^2 + 998956^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256323650457 - 2²⁰ = 2256322601881 is a prime.

It is a super-2 number, since 2×2256323650457² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2256323650657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128161825228 + 1128161825229.

It is an arithmetic number, because the mean of its divisors is an integer number (1128161825229).

Almost surely, 2^{2256323650457} is an apocalyptic number.

It is an amenable number.

2256323650457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256323650457 is an equidigital number, since it uses as much as digits as its factorization.

2256323650457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072000, while the sum is 50.

Adding to 2256323650457 its reverse (7540563236522), we get a palindrome (9796886886979).

The spelling of 2256323650457 in words is "two trillion, two hundred fifty-six billion, three hundred twenty-three million, six hundred fifty thousand, four hundred fifty-seven".