11772223681 has 4 divisors (see below), whose sum is σ = 12151972864. Its totient is φ = 11392474500.

The previous prime is 11772223679. The next prime is 11772223691. The reversal of 11772223681 is 18632227711.

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 a cyclic number.

It is not a de Polignac number, because 11772223681 - 2¹ = 11772223679 is a prime.

It is a super-2 number, since 2×11772223681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11772223691) 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, 189874545 + ... + 189874606.

It is an arithmetic number, because the mean of its divisors is an integer number (3037993216).

Almost surely, 2^11772223681 is an apocalyptic number.

It is an amenable number.

11772223681 is a deficient number, since it is larger than the sum of its proper divisors (379749183).

11772223681 is an equidigital number, since it uses as much as digits as its factorization.

11772223681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379749182.

The product of its digits is 56448, while the sum is 40.

The spelling of 11772223681 in words is "eleven billion, seven hundred seventy-two million, two hundred twenty-three thousand, six hundred eighty-one".