11822913991 has 16 divisors (see below), whose sum is σ = 13792680000. Its totient is φ = 10130233344.

The previous prime is 11822913953. The next prime is 11822914003. The reversal of 11822913991 is 19931922811.

11822913991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11822913991 - 2¹¹ = 11822911943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11822913911) 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 15 ways as a sum of consecutive naturals, for example, 1384551 + ... + 1393063.

It is an arithmetic number, because the mean of its divisors is an integer number (862042500).

Almost surely, 2^11822913991 is an apocalyptic number.

11822913991 is a deficient number, since it is larger than the sum of its proper divisors (1969766009).

11822913991 is an frugal number, since it uses more digits than its factorization.

11822913991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12583 (or 12569 counting only the distinct ones).

The product of its digits is 69984, while the sum is 46.

The spelling of 11822913991 in words is "eleven billion, eight hundred twenty-two million, nine hundred thirteen thousand, nine hundred ninety-one".