2648199891 has 4 divisors (see below), whose sum is σ = 3530933192. Its totient is φ = 1765466592.

The previous prime is 2648199889. The next prime is 2648199923. The reversal of 2648199891 is 1989918462.

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

It is not a de Polignac number, because 2648199891 - 2¹ = 2648199889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2648199791) 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 3 ways as a sum of consecutive naturals, for example, 441366646 + ... + 441366651.

It is an arithmetic number, because the mean of its divisors is an integer number (882733298).

Almost surely, 2^2648199891 is an apocalyptic number.

2648199891 is a deficient number, since it is larger than the sum of its proper divisors (882733301).

2648199891 is an equidigital number, since it uses as much as digits as its factorization.

2648199891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882733300.

The product of its digits is 2239488, while the sum is 57.

The square root of 2648199891 is about 51460.6635305065. The cubic root of 2648199891 is about 1383.5140942608.

The spelling of 2648199891 in words is "two billion, six hundred forty-eight million, one hundred ninety-nine thousand, eight hundred ninety-one".