2640466409 has 16 divisors (see below), whose sum is σ = 3112838400. Its totient is φ = 2192422464.

The previous prime is 2640466393. The next prime is 2640466417. The reversal of 2640466409 is 9046640462.

2640466409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2640466409 - 2⁴ = 2640466393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2640466459) 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, 37052 + ... + 81570.

It is an arithmetic number, because the mean of its divisors is an integer number (194552400).

Almost surely, 2^2640466409 is an apocalyptic number.

It is an amenable number.

2640466409 is a deficient number, since it is larger than the sum of its proper divisors (472371991).

2640466409 is a wasteful number, since it uses less digits than its factorization.

2640466409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44792.

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 2640466409 is about 51385.4688506391. The cubic root of 2640466409 is about 1382.1660322093.

The spelling of 2640466409 in words is "two billion, six hundred forty million, four hundred sixty-six thousand, four hundred nine".