11722636573 has 4 divisors (see below), whose sum is σ = 12232316448. Its totient is φ = 11212956700.

The previous prime is 11722636567. The next prime is 11722636579. The reversal of 11722636573 is 37563622711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (11722636567) and next prime (11722636579).

It is a cyclic number.

It is not a de Polignac number, because 11722636573 - 2⁹ = 11722636061 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 (11722636579) 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, 254839903 + ... + 254839948.

It is an arithmetic number, because the mean of its divisors is an integer number (3058079112).

Almost surely, 2^11722636573 is an apocalyptic number.

It is an amenable number.

11722636573 is a deficient number, since it is larger than the sum of its proper divisors (509679875).

11722636573 is an equidigital number, since it uses as much as digits as its factorization.

11722636573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509679874.

The product of its digits is 317520, while the sum is 43.

The spelling of 11722636573 in words is "eleven billion, seven hundred twenty-two million, six hundred thirty-six thousand, five hundred seventy-three".