636413165103 has 4 divisors (see below), whose sum is σ = 848550886808. Its totient is φ = 424275443400.

The previous prime is 636413165077. The next prime is 636413165107. The reversal of 636413165103 is 301561314636.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 636413165103 - 2⁶ = 636413165039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636413165107) 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, 106068860848 + ... + 106068860853.

It is an arithmetic number, because the mean of its divisors is an integer number (212137721702).

Almost surely, 2^636413165103 is an apocalyptic number.

636413165103 is a deficient number, since it is larger than the sum of its proper divisors (212137721705).

636413165103 is a wasteful number, since it uses less digits than its factorization.

636413165103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212137721704.

The product of its (nonzero) digits is 116640, while the sum is 39.

Adding to 636413165103 its reverse (301561314636), we get a palindrome (937974479739).

The spelling of 636413165103 in words is "six hundred thirty-six billion, four hundred thirteen million, one hundred sixty-five thousand, one hundred three".