2646032640 has 72 divisors (see below), whose sum is σ = 8450779008. Its totient is φ = 705607680.

The previous prime is 2646032633. The next prime is 2646032651. The reversal of 2646032640 is 462306462.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340696 + ... + 348375.

Almost surely, 2^2646032640 is an apocalyptic number.

2646032640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2646032640 is an abundant number, since it is smaller than the sum of its proper divisors (5804746368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2646032640 is an equidigital number, since it uses as much as digits as its factorization.

2646032640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689095 (or 689081 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 2646032640 is about 51439.6018647112. The cubic root of 2646032640 is about 1383.1365748444.

The spelling of 2646032640 in words is "two billion, six hundred forty-six million, thirty-two thousand, six hundred forty".