11917897790 has 16 divisors (see below), whose sum is σ = 21710677968. Its totient is φ = 4709723136.

The previous prime is 11917897769. The next prime is 11917897813. The reversal of 11917897790 is 9779871911.

11917897790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7178627 + ... + 7180286.

It is an arithmetic number, because the mean of its divisors is an integer number (1356917373).

Almost surely, 2^11917897790 is an apocalyptic number.

11917897790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11917897790 is a deficient number, since it is larger than the sum of its proper divisors (9792780178).

11917897790 is a wasteful number, since it uses less digits than its factorization.

11917897790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14359003.

The product of its (nonzero) digits is 2000376, while the sum is 59.

The spelling of 11917897790 in words is "eleven billion, nine hundred seventeen million, eight hundred ninety-seven thousand, seven hundred ninety".