11663784091 has 2 divisors, whose sum is σ = 11663784092. Its totient is φ = 11663784090.

The previous prime is 11663784073. The next prime is 11663784101. The reversal of 11663784091 is 19048736611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11663784091 - 2²⁹ = 11126913179 is a prime.

It is not a weakly prime, because it can be changed into another prime (11663784191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831892045 + 5831892046.

It is an arithmetic number, because the mean of its divisors is an integer number (5831892046).

Almost surely, 2^11663784091 is an apocalyptic number.

11663784091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11663784091 is an equidigital number, since it uses as much as digits as its factorization.

11663784091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 11663784091 in words is "eleven billion, six hundred sixty-three million, seven hundred eighty-four thousand, ninety-one".