6161891889 has 8 divisors (see below), whose sum is σ = 8573067072. Its totient is φ = 3929322320.

The previous prime is 6161891867. The next prime is 6161891891. The reversal of 6161891889 is 9881981616.

6161891889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6161891889 - 2⁸ = 6161891633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6161891789) 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, 44651322 + ... + 44651459.

It is an arithmetic number, because the mean of its divisors is an integer number (1071633384).

Almost surely, 2^6161891889 is an apocalyptic number.

6161891889 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

6161891889 is a deficient number, since it is larger than the sum of its proper divisors (2411175183).

6161891889 is a wasteful number, since it uses less digits than its factorization.

6161891889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89302807.

The product of its digits is 1492992, while the sum is 57.

The square root of 6161891889 is about 78497.7190050768. The cubic root of 6161891889 is about 1833.3189383737.

The spelling of 6161891889 in words is "six billion, one hundred sixty-one million, eight hundred ninety-one thousand, eight hundred eighty-nine".