2646794881 has 4 divisors (see below), whose sum is σ = 2738063700. Its totient is φ = 2555526064.

The previous prime is 2646794873. The next prime is 2646794903. The reversal of 2646794881 is 1884976462.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1264442481 + 1382352400 = 35559^2 + 37180^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646794881 - 2³ = 2646794873 is a prime.

It is a super-2 number, since 2×2646794881² = 14011046284175608322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2646794281) 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, 45634366 + ... + 45634423.

It is an arithmetic number, because the mean of its divisors is an integer number (684515925).

Almost surely, 2^2646794881 is an apocalyptic number.

It is an amenable number.

2646794881 is a deficient number, since it is larger than the sum of its proper divisors (91268819).

2646794881 is an equidigital number, since it uses as much as digits as its factorization.

2646794881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91268818.

The product of its digits is 4644864, while the sum is 55.

The square root of 2646794881 is about 51447.0104184879. The cubic root of 2646794881 is about 1383.2693751949.

The spelling of 2646794881 in words is "two billion, six hundred forty-six million, seven hundred ninety-four thousand, eight hundred eighty-one".