636871068043 has 64 divisors (see below), whose sum is σ = 783841766400. Its totient is φ = 505367216640.

The previous prime is 636871068023. The next prime is 636871068047. The reversal of 636871068043 is 340860178636.

It is a happy number.

It is not a de Polignac number, because 636871068043 - 2²¹ = 636868970891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (636871068047) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 940725021 + ... + 940725697.

It is an arithmetic number, because the mean of its divisors is an integer number (12247527600).

Almost surely, 2^636871068043 is an apocalyptic number.

636871068043 is a deficient number, since it is larger than the sum of its proper divisors (146970698357).

636871068043 is a wasteful number, since it uses less digits than its factorization.

636871068043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 636871068043 in words is "six hundred thirty-six billion, eight hundred seventy-one million, sixty-eight thousand, forty-three".