6400288849 has 4 divisors (see below), whose sum is σ = 6400479600. Its totient is φ = 6400098100.

The previous prime is 6400288813. The next prime is 6400288889. The reversal of 6400288849 is 9488820046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6400288849 - 2⁷ = 6400288721 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6400288889) 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, 30199 + ... + 117100.

It is an arithmetic number, because the mean of its divisors is an integer number (1600119900).

Almost surely, 2^6400288849 is an apocalyptic number.

It is an amenable number.

6400288849 is a deficient number, since it is larger than the sum of its proper divisors (190751).

6400288849 is a wasteful number, since it uses less digits than its factorization.

6400288849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190750.

The product of its (nonzero) digits is 884736, while the sum is 49.

The square root of 6400288849 is about 80001.8052858809. The cubic root of 6400288849 is about 1856.6634646560.

The spelling of 6400288849 in words is "six billion, four hundred million, two hundred eighty-eight thousand, eight hundred forty-nine".