2646412849 has 4 divisors (see below), whose sum is σ = 2655966964. Its totient is φ = 2636858736.

The previous prime is 2646412841. The next prime is 2646412861. The reversal of 2646412849 is 9482146462.

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 850772224 + 1795640625 = 29168^2 + 42375^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646412849 - 2³ = 2646412841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2646412799 and 2646412808.

It is not an unprimeable number, because it can be changed into a prime (2646412841) 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, 4776642 + ... + 4777195.

It is an arithmetic number, because the mean of its divisors is an integer number (663991741).

Almost surely, 2^2646412849 is an apocalyptic number.

It is an amenable number.

2646412849 is a deficient number, since it is larger than the sum of its proper divisors (9554115).

2646412849 is an equidigital number, since it uses as much as digits as its factorization.

2646412849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554114.

The product of its digits is 663552, while the sum is 46.

The square root of 2646412849 is about 51443.2974156984. The cubic root of 2646412849 is about 1383.2028194024.

The spelling of 2646412849 in words is "two billion, six hundred forty-six million, four hundred twelve thousand, eight hundred forty-nine".