2640204433 has 16 divisors (see below), whose sum is σ = 2692374480. Its totient is φ = 2588737536.

The previous prime is 2640204421. The next prime is 2640204439. The reversal of 2640204433 is 3344020462.

2640204433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 312334929 + 2327869504 = 17673^2 + 48248^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640204433 - 2¹³ = 2640196241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640204439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6650191 + ... + 6650587.

It is an arithmetic number, because the mean of its divisors is an integer number (168273405).

Almost surely, 2^2640204433 is an apocalyptic number.

It is an amenable number.

2640204433 is a deficient number, since it is larger than the sum of its proper divisors (52170047).

2640204433 is a wasteful number, since it uses less digits than its factorization.

2640204433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 2640204433 is about 51382.9196620823. The cubic root of 2640204433 is about 1382.1203197923.

Adding to 2640204433 its reverse (3344020462), we get a palindrome (5984224895).

The spelling of 2640204433 in words is "two billion, six hundred forty million, two hundred four thousand, four hundred thirty-three".