10855891 has 4 divisors (see below), whose sum is σ = 10961392. Its totient is φ = 10750392.

The previous prime is 10855879. The next prime is 10855913. The reversal of 10855891 is 19855801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10855891 - 2¹⁹ = 10331603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10855891.

It is not an unprimeable number, because it can be changed into a prime (10855811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52596 + ... + 52801.

It is an arithmetic number, because the mean of its divisors is an integer number (2740348).

Almost surely, 2^10855891 is an apocalyptic number.

10855891 is a deficient number, since it is larger than the sum of its proper divisors (105501).

10855891 is a wasteful number, since it uses less digits than its factorization.

10855891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105500.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 10855891 is about 3294.8279165990. The cubic root of 10855891 is about 221.4225381241.

The spelling of 10855891 in words is "ten million, eight hundred fifty-five thousand, eight hundred ninety-one".