2646436388 has 12 divisors (see below), whose sum is σ = 4636869552. Its totient is φ = 1321616520.

The previous prime is 2646436367. The next prime is 2646436391. The reversal of 2646436388 is 8836346462.

It is an unprimeable number.

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, 396698 + ... + 403313.

It is an arithmetic number, because the mean of its divisors is an integer number (386405796).

Almost surely, 2^2646436388 is an apocalyptic number.

It is an amenable number.

2646436388 is a deficient number, since it is larger than the sum of its proper divisors (1990433164).

2646436388 is a wasteful number, since it uses less digits than its factorization.

2646436388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800842 (or 800840 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 50.

The square root of 2646436388 is about 51443.5262010683. The cubic root of 2646436388 is about 1383.2069204398.

The spelling of 2646436388 in words is "two billion, six hundred forty-six million, four hundred thirty-six thousand, three hundred eighty-eight".