11811431672 has 32 divisors (see below), whose sum is σ = 22455036000. Its totient is φ = 5823949824.

The previous prime is 11811431669. The next prime is 11811431677. The reversal of 11811431672 is 27613411811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811431677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147068 + ... + 212724.

It is an arithmetic number, because the mean of its divisors is an integer number (701719875).

Almost surely, 2^11811431672 is an apocalyptic number.

It is an amenable number.

11811431672 is a deficient number, since it is larger than the sum of its proper divisors (10643604328).

11811431672 is a wasteful number, since it uses less digits than its factorization.

11811431672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65975 (or 65971 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The spelling of 11811431672 in words is "eleven billion, eight hundred eleven million, four hundred thirty-one thousand, six hundred seventy-two".