2645040744 has 80 divisors (see below), whose sum is σ = 7844393700. Its totient is φ = 829813248.

The previous prime is 2645040743. The next prime is 2645040773. The reversal of 2645040744 is 4470405462.

2645040744 is a `hidden beast` number, since 2 + 645 + 0 + 4 + 0 + 7 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1959124644 + 685916100 = 44262^2 + 26190^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2645040699 and 2645040708.

It is not an unprimeable number, because it can be changed into a prime (2645040743) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 109039 + ... + 131070.

Almost surely, 2^2645040744 is an apocalyptic number.

2645040744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2645040744 is an abundant number, since it is smaller than the sum of its proper divisors (5199352956).

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

2645040744 is a wasteful number, since it uses less digits than its factorization.

2645040744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240144 (or 240131 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 36.

The square root of 2645040744 is about 51429.9595955509. The cubic root of 2645040744 is about 1382.9637249862.

The spelling of 2645040744 in words is "two billion, six hundred forty-five million, forty thousand, seven hundred forty-four".