11865630091 has 8 divisors (see below), whose sum is σ = 13998162944. Its totient is φ = 9842457960.

The previous prime is 11865630043. The next prime is 11865630163. The reversal of 11865630091 is 19003656811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11865630091 - 2⁹ = 11865629579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11865630031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27339945 + ... + 27340378.

It is an arithmetic number, because the mean of its divisors is an integer number (1749770368).

Almost surely, 2^11865630091 is an apocalyptic number.

11865630091 is a deficient number, since it is larger than the sum of its proper divisors (2132532853).

11865630091 is an equidigital number, since it uses as much as digits as its factorization.

11865630091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54680361.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 11865630091 in words is "eleven billion, eight hundred sixty-five million, six hundred thirty thousand, ninety-one".