6168969891 has 12 divisors (see below), whose sum is σ = 10183696432. Its totient is φ = 3525125616.

The previous prime is 6168969889. The next prime is 6168969907. The reversal of 6168969891 is 1989698616.

6168969891 is a `hidden beast` number, since 616 + 8 + 9 + 6 + 9 + 8 + 9 + 1 = 666.

It is not a de Polignac number, because 6168969891 - 2¹ = 6168969889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 97920157 = 6168969891 / (6 + 1 + 6 + 8 + 9 + 6 + 9 + 8 + 9 + 1).

It is not an unprimeable number, because it can be changed into a prime (6168969841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48960016 + ... + 48960141.

Almost surely, 2^6168969891 is an apocalyptic number.

6168969891 is a deficient number, since it is larger than the sum of its proper divisors (4014726541).

6168969891 is a wasteful number, since it uses less digits than its factorization.

6168969891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97920170 (or 97920167 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 6168969891 is about 78542.7901910799. The cubic root of 6168969891 is about 1834.0206314050.

The spelling of 6168969891 in words is "six billion, one hundred sixty-eight million, nine hundred sixty-nine thousand, eight hundred ninety-one".