11663155597 has 2 divisors, whose sum is σ = 11663155598. Its totient is φ = 11663155596.

The previous prime is 11663155589. The next prime is 11663155619. The reversal of 11663155597 is 79555136611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8022964041 + 3640191556 = 89571^2 + 60334^2 .

It is a cyclic number.

It is not a de Polignac number, because 11663155597 - 2³ = 11663155589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11663155597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11663155547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831577798 + 5831577799.

It is an arithmetic number, because the mean of its divisors is an integer number (5831577799).

Almost surely, 2^11663155597 is an apocalyptic number.

It is an amenable number.

11663155597 is a deficient number, since it is larger than the sum of its proper divisors (1).

11663155597 is an equidigital number, since it uses as much as digits as its factorization.

11663155597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 49.

The spelling of 11663155597 in words is "eleven billion, six hundred sixty-three million, one hundred fifty-five thousand, five hundred ninety-seven".