11638863623 has 4 divisors (see below), whose sum is σ = 11829664728. Its totient is φ = 11448062520.

The previous prime is 11638863583. The next prime is 11638863631. The reversal of 11638863623 is 32636883611.

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

It is a cyclic number.

It is not a de Polignac number, because 11638863623 - 2¹⁴ = 11638847239 is a prime.

It is a super-2 number, since 2×11638863623² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11638803623) 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, 95400461 + ... + 95400582.

It is an arithmetic number, because the mean of its divisors is an integer number (2957416182).

Almost surely, 2^11638863623 is an apocalyptic number.

11638863623 is a deficient number, since it is larger than the sum of its proper divisors (190801105).

11638863623 is an equidigital number, since it uses as much as digits as its factorization.

11638863623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190801104.

The product of its digits is 746496, while the sum is 47.

The spelling of 11638863623 in words is "eleven billion, six hundred thirty-eight million, eight hundred sixty-three thousand, six hundred twenty-three".