636485137 has 8 divisors (see below), whose sum is σ = 655048256. Its totient is φ = 617993712.

The previous prime is 636485131. The next prime is 636485147. The reversal of 636485137 is 731584636.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636485137 is a prime.

It is a super-2 number, since 2×636485137² = 810226659243817538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 636485093 and 636485102.

It is not an unprimeable number, because it can be changed into a prime (636485131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358 + ... + 35680.

It is an arithmetic number, because the mean of its divisors is an integer number (81881032).

Almost surely, 2^636485137 is an apocalyptic number.

It is an amenable number.

636485137 is a deficient number, since it is larger than the sum of its proper divisors (18563119).

636485137 is a wasteful number, since it uses less digits than its factorization.

636485137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35847.

The product of its digits is 362880, while the sum is 43.

The square root of 636485137 is about 25228.6570589875. The cubic root of 636485137 is about 860.1933660201.

The spelling of 636485137 in words is "six hundred thirty-six million, four hundred eighty-five thousand, one hundred thirty-seven".