636040045501 has 4 divisors (see below), whose sum is σ = 726902909152. Its totient is φ = 545177181852.

The previous prime is 636040045447. The next prime is 636040045561. The reversal of 636040045501 is 105540040636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 636040045501 - 2¹¹ = 636040043453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636040045561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45431431815 + ... + 45431431828.

It is an arithmetic number, because the mean of its divisors is an integer number (181725727288).

Almost surely, 2^636040045501 is an apocalyptic number.

It is an amenable number.

636040045501 is a deficient number, since it is larger than the sum of its proper divisors (90862863651).

636040045501 is an equidigital number, since it uses as much as digits as its factorization.

636040045501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90862863650.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 636040045501 in words is "six hundred thirty-six billion, forty million, forty-five thousand, five hundred one".