2640463445 has 8 divisors (see below), whose sum is σ = 3228340536. Its totient is φ = 2072514496.

The previous prime is 2640463439. The next prime is 2640463447. The reversal of 2640463445 is 5443640462.

It can be written as a sum of positive squares in 4 ways, for example, as 773618596 + 1866844849 = 27814^2 + 43207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2640463445 - 2¹⁸ = 2640201301 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2640463399 and 2640463408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640463447) 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, 4981742 + ... + 4982271.

It is an arithmetic number, because the mean of its divisors is an integer number (403542567).

Almost surely, 2^2640463445 is an apocalyptic number.

It is an amenable number.

2640463445 is a deficient number, since it is larger than the sum of its proper divisors (587877091).

2640463445 is an equidigital number, since it uses as much as digits as its factorization.

2640463445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9964071.

The product of its (nonzero) digits is 276480, while the sum is 38.

The square root of 2640463445 is about 51385.4400097927. The cubic root of 2640463445 is about 1382.1655150353.

The spelling of 2640463445 in words is "two billion, six hundred forty million, four hundred sixty-three thousand, four hundred forty-five".