10997488661 has 2 divisors, whose sum is σ = 10997488662. Its totient is φ = 10997488660.

The previous prime is 10997488637. The next prime is 10997488679. The reversal of 10997488661 is 16688479901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9183580561 + 1813908100 = 95831^2 + 42590^2 .

It is a cyclic number.

It is not a de Polignac number, because 10997488661 - 2³⁰ = 9923746837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10997488661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10997488361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5498744330 + 5498744331.

It is an arithmetic number, because the mean of its divisors is an integer number (5498744331).

Almost surely, 2^10997488661 is an apocalyptic number.

It is an amenable number.

10997488661 is a deficient number, since it is larger than the sum of its proper divisors (1).

10997488661 is an equidigital number, since it uses as much as digits as its factorization.

10997488661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 10997488661 in words is "ten billion, nine hundred ninety-seven million, four hundred eighty-eight thousand, six hundred sixty-one".