2648417891 has 4 divisors (see below), whose sum is σ = 3026763312. Its totient is φ = 2270072472.

The previous prime is 2648417833. The next prime is 2648417903. The reversal of 2648417891 is 1987148462.

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 2648417891 - 2¹⁰ = 2648416867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2648417831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189172700 + ... + 189172713.

It is an arithmetic number, because the mean of its divisors is an integer number (756690828).

Almost surely, 2^2648417891 is an apocalyptic number.

2648417891 is a deficient number, since it is larger than the sum of its proper divisors (378345421).

2648417891 is an equidigital number, since it uses as much as digits as its factorization.

2648417891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378345420.

The product of its digits is 774144, while the sum is 50.

The square root of 2648417891 is about 51462.7816096254. The cubic root of 2648417891 is about 1383.5520568781.

The spelling of 2648417891 in words is "two billion, six hundred forty-eight million, four hundred seventeen thousand, eight hundred ninety-one".