636389277697 has 4 divisors (see below), whose sum is σ = 636392318400. Its totient is φ = 636386236996.

The previous prime is 636389277581. The next prime is 636389277773. The reversal of 636389277697 is 796772983636.

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 636389277697 - 2³⁵ = 602029539329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636389287697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181197 + ... + 1633402.

It is an arithmetic number, because the mean of its divisors is an integer number (159098079600).

Almost surely, 2^636389277697 is an apocalyptic number.

It is an amenable number.

636389277697 is a deficient number, since it is larger than the sum of its proper divisors (3040703).

636389277697 is a wasteful number, since it uses less digits than its factorization.

636389277697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040702.

The product of its digits is 864162432, while the sum is 73.

The spelling of 636389277697 in words is "six hundred thirty-six billion, three hundred eighty-nine million, two hundred seventy-seven thousand, six hundred ninety-seven".