11634041213 has 4 divisors (see below), whose sum is σ = 11642161308. Its totient is φ = 11625921120.

The previous prime is 11634041203. The next prime is 11634041219. The reversal of 11634041213 is 31214043611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31214043611 = 631 ⋅49467581.

It can be written as a sum of positive squares in 2 ways, for example, as 9972419044 + 1661622169 = 99862^2 + 40763^2 .

It is a cyclic number.

It is not a de Polignac number, because 11634041213 - 2²² = 11629846909 is a prime.

It is a super-2 number, since 2×11634041213² (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 (11634041219) 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, 4057898 + ... + 4060763.

It is an arithmetic number, because the mean of its divisors is an integer number (2910540327).

Almost surely, 2^11634041213 is an apocalyptic number.

It is an amenable number.

11634041213 is a deficient number, since it is larger than the sum of its proper divisors (8120095).

11634041213 is an equidigital number, since it uses as much as digits as its factorization.

11634041213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8120094.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 11634041213 its reverse (31214043611), we get a palindrome (42848084824).

The spelling of 11634041213 in words is "eleven billion, six hundred thirty-four million, forty-one thousand, two hundred thirteen".