11198923657 has 2 divisors, whose sum is σ = 11198923658. Its totient is φ = 11198923656.

The previous prime is 11198923643. The next prime is 11198923679. The reversal of 11198923657 is 75632989111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9876583161 + 1322340496 = 99381^2 + 36364^2 .

It is a cyclic number.

It is not a de Polignac number, because 11198923657 - 2⁷ = 11198923529 is a prime.

It is not a weakly prime, because it can be changed into another prime (11198923457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5599461828 + 5599461829.

It is an arithmetic number, because the mean of its divisors is an integer number (5599461829).

Almost surely, 2^11198923657 is an apocalyptic number.

It is an amenable number.

11198923657 is a deficient number, since it is larger than the sum of its proper divisors (1).

11198923657 is an equidigital number, since it uses as much as digits as its factorization.

11198923657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 52.

The spelling of 11198923657 in words is "eleven billion, one hundred ninety-eight million, nine hundred twenty-three thousand, six hundred fifty-seven".