636247545506 has 16 divisors (see below), whose sum is σ = 957537095544. Its totient is φ = 317068761984.

The previous prime is 636247545481. The next prime is 636247545523. The reversal of 636247545506 is 605545742636.

It can be written as a sum of positive squares in 4 ways, for example, as 631880318281 + 4367227225 = 794909^2 + 66085^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5474456 + ... + 5589468.

Almost surely, 2^636247545506 is an apocalyptic number.

636247545506 is a deficient number, since it is larger than the sum of its proper divisors (321289550038).

636247545506 is a wasteful number, since it uses less digits than its factorization.

636247545506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124165.

The product of its (nonzero) digits is 18144000, while the sum is 53.

The spelling of 636247545506 in words is "six hundred thirty-six billion, two hundred forty-seven million, five hundred forty-five thousand, five hundred six".