2640535646 has 16 divisors (see below), whose sum is σ = 4528414944. Its totient is φ = 1131212544.

The previous prime is 2640535607. The next prime is 2640535687. The reversal of 2640535646 is 6465350462.

It is a happy number.

2640535646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1046 + ... + 72678.

It is an arithmetic number, because the mean of its divisors is an integer number (283025934).

Almost surely, 2^2640535646 is an apocalyptic number.

2640535646 is a deficient number, since it is larger than the sum of its proper divisors (1887879298).

2640535646 is a wasteful number, since it uses less digits than its factorization.

2640535646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74275.

The product of its (nonzero) digits is 518400, while the sum is 41.

The square root of 2640535646 is about 51386.1425483564. The cubic root of 2640535646 is about 1382.1781129277.

The spelling of 2640535646 in words is "two billion, six hundred forty million, five hundred thirty-five thousand, six hundred forty-six".