11942045881 has 4 divisors (see below), whose sum is σ = 11948329764. Its totient is φ = 11935762000.

The previous prime is 11942045867. The next prime is 11942045909. The reversal of 11942045881 is 18854024911.

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 431974656 + 11510071225 = 20784^2 + 107285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11942045881 is a prime.

It is a super-2 number, since 2×11942045881² (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 (11942045821) 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, 3139090 + ... + 3142891.

It is an arithmetic number, because the mean of its divisors is an integer number (2987082441).

Almost surely, 2^11942045881 is an apocalyptic number.

It is an amenable number.

11942045881 is a deficient number, since it is larger than the sum of its proper divisors (6283883).

11942045881 is an equidigital number, since it uses as much as digits as its factorization.

11942045881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283882.

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 11942045881 in words is "eleven billion, nine hundred forty-two million, forty-five thousand, eight hundred eighty-one".