11111265497 has 2 divisors, whose sum is σ = 11111265498. Its totient is φ = 11111265496.

The previous prime is 11111265491. The next prime is 11111265509. The reversal of 11111265497 is 79456211111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7895921881 + 3215343616 = 88859^2 + 56704^2 .

It is an emirp because it is prime and its reverse (79456211111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111265497 - 2⁴ = 11111265481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11111265497.

It is not a weakly prime, because it can be changed into another prime (11111265491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555632748 + 5555632749.

It is an arithmetic number, because the mean of its divisors is an integer number (5555632749).

Almost surely, 2^11111265497 is an apocalyptic number.

It is an amenable number.

11111265497 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111265497 is an equidigital number, since it uses as much as digits as its factorization.

11111265497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 38.

The spelling of 11111265497 in words is "eleven billion, one hundred eleven million, two hundred sixty-five thousand, four hundred ninety-seven".