13191691556 has 12 divisors (see below), whose sum is σ = 23086575792. Its totient is φ = 6595527048.

The previous prime is 13191691531. The next prime is 13191691619. The reversal of 13191691556 is 65519619131.

It is a super-2 number, since 2×13191691556² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13191691556.

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, 30311 + ... + 165233.

It is an arithmetic number, because the mean of its divisors is an integer number (1923881316).

Almost surely, 2^13191691556 is an apocalyptic number.

It is an amenable number.

13191691556 is a deficient number, since it is larger than the sum of its proper divisors (9894884236).

13191691556 is a wasteful number, since it uses less digits than its factorization.

13191691556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159370 (or 159368 counting only the distinct ones).

The product of its digits is 218700, while the sum is 47.

The spelling of 13191691556 in words is "thirteen billion, one hundred ninety-one million, six hundred ninety-one thousand, five hundred fifty-six".