2189095857 has 12 divisors (see below), whose sum is σ = 3405260404. Its totient is φ = 1347135840.

The previous prime is 2189095823. The next prime is 2189095871. The reversal of 2189095857 is 7585909812.

It can be written as a sum of positive squares in 2 ways, for example, as 1008761121 + 1180334736 = 31761^2 + 34356^2 .

It is not a de Polignac number, because 2189095857 - 2⁶ = 2189095793 is a prime.

It is a super-2 number, since 2×2189095857² = 9584281342269128898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2189095807) 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, 9354994 + ... + 9355227.

Almost surely, 2^2189095857 is an apocalyptic number.

It is an amenable number.

2189095857 is a deficient number, since it is larger than the sum of its proper divisors (1216164547).

2189095857 is a wasteful number, since it uses less digits than its factorization.

2189095857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18710240 (or 18710237 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The square root of 2189095857 is about 46787.7746532147. The cubic root of 2189095857 is about 1298.4391240832.

The spelling of 2189095857 in words is "two billion, one hundred eighty-nine million, ninety-five thousand, eight hundred fifty-seven".