636040172 has 12 divisors (see below), whose sum is σ = 1117932480. Its totient is φ = 316630896.

The previous prime is 636040169. The next prime is 636040177. The reversal of 636040172 is 271040636.

It is not an unprimeable number, because it can be changed into a prime (636040177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346268 + ... + 348099.

It is an arithmetic number, because the mean of its divisors is an integer number (93161040).

Almost surely, 2^636040172 is an apocalyptic number.

It is an amenable number.

636040172 is a deficient number, since it is larger than the sum of its proper divisors (481892308).

636040172 is a wasteful number, since it uses less digits than its factorization.

636040172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694600 (or 694598 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 636040172 is about 25219.8368749681. The cubic root of 636040172 is about 859.9928663551.

The spelling of 636040172 in words is "six hundred thirty-six million, forty thousand, one hundred seventy-two".