11618248661 has 2 divisors, whose sum is σ = 11618248662. Its totient is φ = 11618248660.

The previous prime is 11618248583. The next prime is 11618248703. The reversal of 11618248661 is 16684281611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9088762225 + 2529486436 = 95335^2 + 50294^2 .

It is an emirp because it is prime and its reverse (16684281611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11618248661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11618238661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5809124330 + 5809124331.

It is an arithmetic number, because the mean of its divisors is an integer number (5809124331).

Almost surely, 2^11618248661 is an apocalyptic number.

It is an amenable number.

11618248661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11618248661 is an equidigital number, since it uses as much as digits as its factorization.

11618248661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 44.

The spelling of 11618248661 in words is "eleven billion, six hundred eighteen million, two hundred forty-eight thousand, six hundred sixty-one".