11822799491 has 4 divisors (see below), whose sum is σ = 11823233184. Its totient is φ = 11822365800.

The previous prime is 11822799487. The next prime is 11822799497. The reversal of 11822799491 is 19499722811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19499722811 = 521 ⋅37427491.

It is a cyclic number.

It is not a de Polignac number, because 11822799491 - 2² = 11822799487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11822799497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173000 + ... + 231461.

It is an arithmetic number, because the mean of its divisors is an integer number (2955808296).

Almost surely, 2^11822799491 is an apocalyptic number.

11822799491 is a deficient number, since it is larger than the sum of its proper divisors (433693).

11822799491 is an equidigital number, since it uses as much as digits as its factorization.

11822799491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433692.

The product of its digits is 653184, while the sum is 53.

The spelling of 11822799491 in words is "eleven billion, eight hundred twenty-two million, seven hundred ninety-nine thousand, four hundred ninety-one".