636132708645 has 64 divisors (see below), whose sum is σ = 1182288666624. Its totient is φ = 286072300800.

The previous prime is 636132708571. The next prime is 636132708697. The reversal of 636132708645 is 546807231636.

It is not a de Polignac number, because 636132708645 - 2¹⁰ = 636132707621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1438299 + ... + 1827831.

It is an arithmetic number, because the mean of its divisors is an integer number (18473260416).

Almost surely, 2^636132708645 is an apocalyptic number.

It is an amenable number.

636132708645 is a deficient number, since it is larger than the sum of its proper divisors (546155957979).

636132708645 is a wasteful number, since it uses less digits than its factorization.

636132708645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389802.

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 636132708645 in words is "six hundred thirty-six billion, one hundred thirty-two million, seven hundred eight thousand, six hundred forty-five".