8191522431516 has 12 divisors (see below), whose sum is σ = 19113552340232. Its totient is φ = 2730507477168.

The previous prime is 8191522431493. The next prime is 8191522431559. The reversal of 8191522431516 is 6151342251918.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341313434635 + ... + 341313434658.

Almost surely, 2^{8191522431516} is an apocalyptic number.

It is an amenable number.

8191522431516 is an abundant number, since it is smaller than the sum of its proper divisors (10922029908716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8191522431516 is a wasteful number, since it uses less digits than its factorization.

8191522431516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682626869300 (or 682626869298 counting only the distinct ones).

The product of its digits is 518400, while the sum is 48.

The spelling of 8191522431516 in words is "eight trillion, one hundred ninety-one billion, five hundred twenty-two million, four hundred thirty-one thousand, five hundred sixteen".