636711442 has 8 divisors (see below), whose sum is σ = 955572156. Its totient is φ = 318187392.

The previous prime is 636711407. The next prime is 636711469. The reversal of 636711442 is 244117636.

636711442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 630060201 + 6651241 = 25101^2 + 2579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 636711398 and 636711407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79383 + ... + 87034.

Almost surely, 2^636711442 is an apocalyptic number.

636711442 is a deficient number, since it is larger than the sum of its proper divisors (318860714).

636711442 is a wasteful number, since it uses less digits than its factorization.

636711442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168332.

The product of its digits is 24192, while the sum is 34.

The square root of 636711442 is about 25233.1417385945. The cubic root of 636711442 is about 860.2953024108.

The spelling of 636711442 in words is "six hundred thirty-six million, seven hundred eleven thousand, four hundred forty-two".