2856455899 has 4 divisors (see below), whose sum is σ = 3116133720. Its totient is φ = 2596778080.

The previous prime is 2856455869. The next prime is 2856455911. The reversal of 2856455899 is 9985546582.

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 2856455899 - 2⁹ = 2856455387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2856455809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129838894 + ... + 129838915.

It is an arithmetic number, because the mean of its divisors is an integer number (779033430).

Almost surely, 2^2856455899 is an apocalyptic number.

2856455899 is a deficient number, since it is larger than the sum of its proper divisors (259677821).

2856455899 is a wasteful number, since it uses less digits than its factorization.

2856455899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259677820.

The product of its digits is 31104000, while the sum is 61.

The square root of 2856455899 is about 53445.8220911607. The cubic root of 2856455899 is about 1418.8696782636.

The spelling of 2856455899 in words is "two billion, eight hundred fifty-six million, four hundred fifty-five thousand, eight hundred ninety-nine".