11646248557 has 2 divisors, whose sum is σ = 11646248558. Its totient is φ = 11646248556.

The previous prime is 11646248519. The next prime is 11646248587. The reversal of 11646248557 is 75584264611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11215021801 + 431226756 = 105901^2 + 20766^2 .

It is a cyclic number.

It is not a de Polignac number, because 11646248557 - 2¹⁹ = 11645724269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11646248557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11646248507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5823124278 + 5823124279.

It is an arithmetic number, because the mean of its divisors is an integer number (5823124279).

Almost surely, 2^11646248557 is an apocalyptic number.

It is an amenable number.

11646248557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11646248557 is an equidigital number, since it uses as much as digits as its factorization.

11646248557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 49.

The spelling of 11646248557 in words is "eleven billion, six hundred forty-six million, two hundred forty-eight thousand, five hundred fifty-seven".