11192797991 has 2 divisors, whose sum is σ = 11192797992. Its totient is φ = 11192797990.

The previous prime is 11192797981. The next prime is 11192798077. The reversal of 11192797991 is 19979729111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11192797991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11192797981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5596398995 + 5596398996.

It is an arithmetic number, because the mean of its divisors is an integer number (5596398996).

Almost surely, 2^11192797991 is an apocalyptic number.

11192797991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11192797991 is an equidigital number, since it uses as much as digits as its factorization.

11192797991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 56.

The spelling of 11192797991 in words is "eleven billion, one hundred ninety-two million, seven hundred ninety-seven thousand, nine hundred ninety-one".