11198920657 has 2 divisors, whose sum is σ = 11198920658. Its totient is φ = 11198920656.

The previous prime is 11198920613. The next prime is 11198920679. The reversal of 11198920657 is 75602989111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8581984321 + 2616936336 = 92639^2 + 51156^2 .

It is a cyclic number.

It is not a de Polignac number, because 11198920657 - 2¹⁹ = 11198396369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11198920657.

It is not a weakly prime, because it can be changed into another prime (11198923657) 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, 5599460328 + 5599460329.

It is an arithmetic number, because the mean of its divisors is an integer number (5599460329).

Almost surely, 2^11198920657 is an apocalyptic number.

It is an amenable number.

11198920657 is a deficient number, since it is larger than the sum of its proper divisors (1).

11198920657 is an equidigital number, since it uses as much as digits as its factorization.

11198920657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 11198920657 in words is "eleven billion, one hundred ninety-eight million, nine hundred twenty thousand, six hundred fifty-seven".