2643604720 has 40 divisors (see below), whose sum is σ = 6507936144. Its totient is φ = 995238912.

The previous prime is 2643604709. The next prime is 2643604741. The reversal of 2643604720 is 274063462.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 970554 + ... + 973273.

Almost surely, 2^2643604720 is an apocalyptic number.

2643604720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2643604720 is an abundant number, since it is smaller than the sum of its proper divisors (3864331424).

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

2643604720 is a wasteful number, since it uses less digits than its factorization.

2643604720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943857 (or 1943851 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 2643604720 is about 51415.9967325345. The cubic root of 2643604720 is about 1382.7134038755.

The spelling of 2643604720 in words is "two billion, six hundred forty-three million, six hundred four thousand, seven hundred twenty".