636394006670 has 32 divisors (see below), whose sum is σ = 1162685805696. Its totient is φ = 250741101600.

The previous prime is 636394006669. The next prime is 636394006691. The reversal of 636394006670 is 76600493636.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14913665 + ... + 14956275.

It is an arithmetic number, because the mean of its divisors is an integer number (36333931428).

Almost surely, 2^636394006670 is an apocalyptic number.

636394006670 is a deficient number, since it is larger than the sum of its proper divisors (526291799026).

636394006670 is a wasteful number, since it uses less digits than its factorization.

636394006670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64976.

The product of its (nonzero) digits is 2939328, while the sum is 50.

The spelling of 636394006670 in words is "six hundred thirty-six billion, three hundred ninety-four million, six thousand, six hundred seventy".