11881022806 has 4 divisors (see below), whose sum is σ = 17821534212. Its totient is φ = 5940511402.

The previous prime is 11881022743. The next prime is 11881022809. The reversal of 11881022806 is 60822018811.

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: 60822018811 = 103 ⋅590505037.

It is a super-2 number, since 2×11881022806² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11881022809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2970255700 + ... + 2970255703.

It is an arithmetic number, because the mean of its divisors is an integer number (4455383553).

Almost surely, 2^11881022806 is an apocalyptic number.

11881022806 is a deficient number, since it is larger than the sum of its proper divisors (5940511406).

11881022806 is an equidigital number, since it uses as much as digits as its factorization.

11881022806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940511405.

The product of its (nonzero) digits is 12288, while the sum is 37.

The spelling of 11881022806 in words is "eleven billion, eight hundred eighty-one million, twenty-two thousand, eight hundred six".