6394135906 has 16 divisors (see below), whose sum is σ = 9712269504. Its totient is φ = 3156756624.

The previous prime is 6394135843. The next prime is 6394135927. The reversal of 6394135906 is 6095314936.

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, 310915 + ... + 330841.

It is an arithmetic number, because the mean of its divisors is an integer number (607016844).

Almost surely, 2^6394135906 is an apocalyptic number.

6394135906 is a deficient number, since it is larger than the sum of its proper divisors (3318133598).

6394135906 is a wasteful number, since it uses less digits than its factorization.

6394135906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21945.

The product of its (nonzero) digits is 524880, while the sum is 46.

The square root of 6394135906 is about 79963.3410132418. The cubic root of 6394135906 is about 1856.0683036400.

The spelling of 6394135906 in words is "six billion, three hundred ninety-four million, one hundred thirty-five thousand, nine hundred six".