11966025491 has 4 divisors (see below), whose sum is σ = 13675457712. Its totient is φ = 10256593272.

The previous prime is 11966025481. The next prime is 11966025497. The reversal of 11966025491 is 19452066911.

11966025491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11966025491 - 2⁶ = 11966025427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11966025497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854716100 + ... + 854716113.

It is an arithmetic number, because the mean of its divisors is an integer number (3418864428).

Almost surely, 2^11966025491 is an apocalyptic number.

11966025491 is a deficient number, since it is larger than the sum of its proper divisors (1709432221).

11966025491 is an equidigital number, since it uses as much as digits as its factorization.

11966025491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709432220.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 11966025491 in words is "eleven billion, nine hundred sixty-six million, twenty-five thousand, four hundred ninety-one".