2891371845 has 16 divisors (see below), whose sum is σ = 4751228160. Its totient is φ = 1500387264.

The previous prime is 2891371843. The next prime is 2891371853. The reversal of 2891371845 is 5481731982.

2891371845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2891371845 - 2¹ = 2891371843 is a prime.

It is a super-2 number, since 2×2891371845² = 16720062292117408050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2891371794 and 2891371803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891371841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2604285 + ... + 2605394.

It is an arithmetic number, because the mean of its divisors is an integer number (296951760).

Almost surely, 2^2891371845 is an apocalyptic number.

It is an amenable number.

2891371845 is a deficient number, since it is larger than the sum of its proper divisors (1859856315).

2891371845 is a wasteful number, since it uses less digits than its factorization.

2891371845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5209724.

The product of its digits is 483840, while the sum is 48.

The square root of 2891371845 is about 53771.4779878701. The cubic root of 2891371845 is about 1424.6274754145.

The spelling of 2891371845 in words is "two billion, eight hundred ninety-one million, three hundred seventy-one thousand, eight hundred forty-five".