2644646446 has 16 divisors (see below), whose sum is σ = 4523423184. Its totient is φ = 1148805504.

The previous prime is 2644646443. The next prime is 2644646449. The reversal of 2644646446 is 6446464462.

It is an interprime number because it is at equal distance from previous prime (2644646443) and next prime (2644646449).

It is a junction number, because it is equal to n+sod(n) for n = 2644646396 and 2644646405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644646443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2991240 + ... + 2992123.

It is an arithmetic number, because the mean of its divisors is an integer number (282713949).

Almost surely, 2^2644646446 is an apocalyptic number.

2644646446 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2644646446 is a deficient number, since it is larger than the sum of its proper divisors (1878776738).

2644646446 is a wasteful number, since it uses less digits than its factorization.

2644646446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5983395.

The product of its digits is 2654208, while the sum is 46.

The square root of 2644646446 is about 51426.1261033728. The cubic root of 2644646446 is about 1382.8950017942.

The spelling of 2644646446 in words is "two billion, six hundred forty-four million, six hundred forty-six thousand, four hundred forty-six".