11671891199 has 2 divisors, whose sum is σ = 11671891200. Its totient is φ = 11671891198.

The previous prime is 11671891171. The next prime is 11671891211. The reversal of 11671891199 is 99119817611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11671891199 - 2⁸ = 11671890943 is a prime.

It is a super-2 number, since 2×11671891199² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11671891199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11671891799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5835945599 + 5835945600.

It is an arithmetic number, because the mean of its divisors is an integer number (5835945600).

Almost surely, 2^11671891199 is an apocalyptic number.

11671891199 is a deficient number, since it is larger than the sum of its proper divisors (1).

11671891199 is an equidigital number, since it uses as much as digits as its factorization.

11671891199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 53.

The spelling of 11671891199 in words is "eleven billion, six hundred seventy-one million, eight hundred ninety-one thousand, one hundred ninety-nine".