3640053906 has 36 divisors (see below), whose sum is σ = 8353133802. Its totient is φ = 1141646592.

The previous prime is 3640053881. The next prime is 3640053941. The reversal of 3640053906 is 6093500463.

3640053906 is a `hidden beast` number, since 3 + 640 + 0 + 5 + 3 + 9 + 0 + 6 = 666.

3640053906 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1203743025 + 2436310881 = 34695^2 + 49359^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1053670 + ... + 1057118.

Almost surely, 2^3640053906 is an apocalyptic number.

3640053906 is an abundant number, since it is smaller than the sum of its proper divisors (4713079896).

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

3640053906 is an equidigital number, since it uses as much as digits as its factorization.

3640053906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6923 (or 3471 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 3640053906 is about 60332.8592559643. The cubic root of 3640053906 is about 1538.2819297683.

The spelling of 3640053906 in words is "three billion, six hundred forty million, fifty-three thousand, nine hundred six".