6191681613 has 8 divisors (see below), whose sum is σ = 8890619808. Its totient is φ = 3810265584.

The previous prime is 6191681603. The next prime is 6191681621. The reversal of 6191681613 is 3161861916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6191681613 - 2⁸ = 6191681357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6191681603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79380495 + ... + 79380572.

It is an arithmetic number, because the mean of its divisors is an integer number (1111327476).

Almost surely, 2^6191681613 is an apocalyptic number.

It is an amenable number.

6191681613 is a deficient number, since it is larger than the sum of its proper divisors (2698938195).

6191681613 is a wasteful number, since it uses less digits than its factorization.

6191681613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158761083.

The product of its digits is 46656, while the sum is 42.

The square root of 6191681613 is about 78687.2392005209. The cubic root of 6191681613 is about 1836.2685892843.

The spelling of 6191681613 in words is "six billion, one hundred ninety-one million, six hundred eighty-one thousand, six hundred thirteen".