11917501886 has 4 divisors (see below), whose sum is σ = 17876252832. Its totient is φ = 5958750942.

The previous prime is 11917501861. The next prime is 11917501927. The reversal of 11917501886 is 68810571911.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11917501886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2979375470 + ... + 2979375473.

It is an arithmetic number, because the mean of its divisors is an integer number (4469063208).

Almost surely, 2^11917501886 is an apocalyptic number.

11917501886 is a deficient number, since it is larger than the sum of its proper divisors (5958750946).

11917501886 is an equidigital number, since it uses as much as digits as its factorization.

11917501886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5958750945.

The product of its (nonzero) digits is 120960, while the sum is 47.

The spelling of 11917501886 in words is "eleven billion, nine hundred seventeen million, five hundred one thousand, eight hundred eighty-six".