636343046672 has 40 divisors (see below), whose sum is σ = 1262217174240. Its totient is φ = 310616974080.

The previous prime is 636343046659. The next prime is 636343046683. The reversal of 636343046672 is 276640343636.

It is a self number, because there is not a number n which added to its sum of digits gives 636343046672.

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, 1153604 + ... + 1613532.

It is an arithmetic number, because the mean of its divisors is an integer number (31555429356).

Almost surely, 2^636343046672 is an apocalyptic number.

It is an amenable number.

636343046672 is a deficient number, since it is larger than the sum of its proper divisors (625874127568).

636343046672 is a wasteful number, since it uses less digits than its factorization.

636343046672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461991 (or 461985 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 50.

The spelling of 636343046672 in words is "six hundred thirty-six billion, three hundred forty-three million, forty-six thousand, six hundred seventy-two".