11638414231 has 4 divisors (see below), whose sum is σ = 11639120472. Its totient is φ = 11637707992.

The previous prime is 11638414189. The next prime is 11638414303. The reversal of 11638414231 is 13241483611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13241483611 = 397 ⋅33353863.

It is a cyclic number.

It is not a de Polignac number, because 11638414231 - 2¹⁹ = 11637889943 is a prime.

It is a super-2 number, since 2×11638414231² (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 (11638414331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327796 + ... + 361561.

It is an arithmetic number, because the mean of its divisors is an integer number (2909780118).

Almost surely, 2^11638414231 is an apocalyptic number.

11638414231 is a deficient number, since it is larger than the sum of its proper divisors (706241).

11638414231 is an equidigital number, since it uses as much as digits as its factorization.

11638414231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706240.

The product of its digits is 13824, while the sum is 34.

Adding to 11638414231 its reverse (13241483611), we get a palindrome (24879897842).

The spelling of 11638414231 in words is "eleven billion, six hundred thirty-eight million, four hundred fourteen thousand, two hundred thirty-one".