11553256657 has 2 divisors, whose sum is σ = 11553256658. Its totient is φ = 11553256656.

The previous prime is 11553256643. The next prime is 11553256667. The reversal of 11553256657 is 75665235511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11278227601 + 275029056 = 106199^2 + 16584^2 .

It is a cyclic number.

It is not a de Polignac number, because 11553256657 - 2⁷ = 11553256529 is a prime.

It is not a weakly prime, because it can be changed into another prime (11553256667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5776628328 + 5776628329.

It is an arithmetic number, because the mean of its divisors is an integer number (5776628329).

Almost surely, 2^11553256657 is an apocalyptic number.

It is an amenable number.

11553256657 is a deficient number, since it is larger than the sum of its proper divisors (1).

11553256657 is an equidigital number, since it uses as much as digits as its factorization.

11553256657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 945000, while the sum is 46.

The spelling of 11553256657 in words is "eleven billion, five hundred fifty-three million, two hundred fifty-six thousand, six hundred fifty-seven".