11722569997 has 4 divisors (see below), whose sum is σ = 12412132956. Its totient is φ = 11033007040.

The previous prime is 11722569953. The next prime is 11722570073. The reversal of 11722569997 is 79996522711.

11722569997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7193414596 + 4529155401 = 84814^2 + 67299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11722569997 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11722569197) 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 3 ways as a sum of consecutive naturals, for example, 344781454 + ... + 344781487.

It is an arithmetic number, because the mean of its divisors is an integer number (3103033239).

Almost surely, 2^11722569997 is an apocalyptic number.

11722569997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11722569997 is a deficient number, since it is larger than the sum of its proper divisors (689562959).

11722569997 is an equidigital number, since it uses as much as digits as its factorization.

11722569997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689562958.

The product of its digits is 4286520, while the sum is 58.

The spelling of 11722569997 in words is "eleven billion, seven hundred twenty-two million, five hundred sixty-nine thousand, nine hundred ninety-seven".