11951267191 has 2 divisors, whose sum is σ = 11951267192. Its totient is φ = 11951267190.

The previous prime is 11951267179. The next prime is 11951267231. The reversal of 11951267191 is 19176215911.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11951267191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11951267101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5975633595 + 5975633596.

It is an arithmetic number, because the mean of its divisors is an integer number (5975633596).

Almost surely, 2^11951267191 is an apocalyptic number.

11951267191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11951267191 is an equidigital number, since it uses as much as digits as its factorization.

11951267191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 43.

The spelling of 11951267191 in words is "eleven billion, nine hundred fifty-one million, two hundred sixty-seven thousand, one hundred ninety-one".