11255215522657 has 2 divisors, whose sum is σ = 11255215522658. Its totient is φ = 11255215522656.

The previous prime is 11255215522613. The next prime is 11255215522667. The reversal of 11255215522657 is 75622551255211.

11255215522657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10732542915136 + 522672607521 = 3276056^2 + 722961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11255215522657 is a prime.

It is a super-2 number, since 2×11255215522657² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11255215522657.

It is not a weakly prime, because it can be changed into another prime (11255215522667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5627607761328 + 5627607761329.

It is an arithmetic number, because the mean of its divisors is an integer number (5627607761329).

Almost surely, 2^{11255215522657} is an apocalyptic number.

It is an amenable number.

11255215522657 is a deficient number, since it is larger than the sum of its proper divisors (1).

11255215522657 is an equidigital number, since it uses as much as digits as its factorization.

11255215522657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100000, while the sum is 49.

Adding to 11255215522657 its reverse (75622551255211), we get a palindrome (86877766777868).

The spelling of 11255215522657 in words is "eleven trillion, two hundred fifty-five billion, two hundred fifteen million, five hundred twenty-two thousand, six hundred fifty-seven".