11885812906 has 16 divisors (see below), whose sum is σ = 19602662400. Its totient is φ = 5360100480.

The previous prime is 11885812903. The next prime is 11885812907. The reversal of 11885812906 is 60921858811.

It is a self number, because there is not a number n which added to its sum of digits gives 11885812906.

It is not an unprimeable number, because it can be changed into a prime (11885812903) 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, 2124231 + ... + 2129818.

It is an arithmetic number, because the mean of its divisors is an integer number (1225166400).

Almost surely, 2^11885812906 is an apocalyptic number.

11885812906 is a deficient number, since it is larger than the sum of its proper divisors (7716849494).

11885812906 is a wasteful number, since it uses less digits than its factorization.

11885812906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254189.

The product of its (nonzero) digits is 276480, while the sum is 49.

The spelling of 11885812906 in words is "eleven billion, eight hundred eighty-five million, eight hundred twelve thousand, nine hundred six".