8194131544 has 16 divisors (see below), whose sum is σ = 15859609920. Its totient is φ = 3964902240.

The previous prime is 8194131541. The next prime is 8194131553. The reversal of 8194131544 is 4451314918.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8194131497 and 8194131506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8194131541) 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, 16520179 + ... + 16520674.

It is an arithmetic number, because the mean of its divisors is an integer number (991225620).

Almost surely, 2^8194131544 is an apocalyptic number.

It is an amenable number.

8194131544 is a deficient number, since it is larger than the sum of its proper divisors (7665478376).

8194131544 is a wasteful number, since it uses less digits than its factorization.

8194131544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33040890 (or 33040886 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 8194131544 is about 90521.4424542605. The cubic root of 8194131544 is about 2016.0485069321.

The spelling of 8194131544 in words is "eight billion, one hundred ninety-four million, one hundred thirty-one thousand, five hundred forty-four".