636705652 has 48 divisors (see below), whose sum is σ = 1258467840. Its totient is φ = 279244800.

The previous prime is 636705611. The next prime is 636705721. The reversal of 636705652 is 256507636.

It is an alternating number because its digits alternate between even and odd.

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, 786624 + ... + 787432.

It is an arithmetic number, because the mean of its divisors is an integer number (26218080).

Almost surely, 2^636705652 is an apocalyptic number.

636705652 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

636705652 is a deficient number, since it is larger than the sum of its proper divisors (621762188).

636705652 is a wasteful number, since it uses less digits than its factorization.

636705652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 40.

The square root of 636705652 is about 25233.0270082684. The cubic root of 636705652 is about 860.2926946754.

The spelling of 636705652 in words is "six hundred thirty-six million, seven hundred five thousand, six hundred fifty-two".