2646578893 has 4 divisors (see below), whose sum is σ = 3024661600. Its totient is φ = 2268496188.

The previous prime is 2646578873. The next prime is 2646578897. The reversal of 2646578893 is 3988756462.

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 not a de Polignac number, because 2646578893 - 2¹³ = 2646570701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646578897) 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, 189041343 + ... + 189041356.

It is an arithmetic number, because the mean of its divisors is an integer number (756165400).

Almost surely, 2^2646578893 is an apocalyptic number.

It is an amenable number.

2646578893 is a deficient number, since it is larger than the sum of its proper divisors (378082707).

2646578893 is an equidigital number, since it uses as much as digits as its factorization.

2646578893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378082706.

The product of its digits is 17418240, while the sum is 58.

The square root of 2646578893 is about 51444.9112449424. The cubic root of 2646578893 is about 1383.2317475828.

The spelling of 2646578893 in words is "two billion, six hundred forty-six million, five hundred seventy-eight thousand, eight hundred ninety-three".