6168442491 has 12 divisors (see below), whose sum is σ = 9239971832. Its totient is φ = 4112294832.

The previous prime is 6168442487. The next prime is 6168442513. The reversal of 6168442491 is 1942448616.

6168442491 is a `hidden beast` number, since 6 + 168 + 442 + 49 + 1 = 666.

It is not a de Polignac number, because 6168442491 - 2² = 6168442487 is a prime.

It is a super-3 number, since 3×6168442491³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6168442411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12692026 + ... + 12692511.

Almost surely, 2^6168442491 is an apocalyptic number.

6168442491 is a deficient number, since it is larger than the sum of its proper divisors (3071529341).

6168442491 is an equidigital number, since it uses as much as digits as its factorization.

6168442491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25384552 (or 25384540 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 6168442491 is about 78539.4327137649. The cubic root of 6168442491 is about 1833.9683649778.

The spelling of 6168442491 in words is "six billion, one hundred sixty-eight million, four hundred forty-two thousand, four hundred ninety-one".