1636441043131 has 4 divisors (see below), whose sum is σ = 1637812746792. Its totient is φ = 1635069339472.

The previous prime is 1636441043117. The next prime is 1636441043189. The reversal of 1636441043131 is 1313401446361.

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 1636441043131 - 2¹³ = 1636441034939 is a prime.

It is a super-2 number, since 2×1636441043131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1636441053131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685850041 + ... + 685852426.

It is an arithmetic number, because the mean of its divisors is an integer number (409453186698).

Almost surely, 2^{1636441043131} is an apocalyptic number.

1636441043131 is a deficient number, since it is larger than the sum of its proper divisors (1371703661).

1636441043131 is a wasteful number, since it uses less digits than its factorization.

1636441043131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371703660.

The product of its (nonzero) digits is 62208, while the sum is 37.

Adding to 1636441043131 its reverse (1313401446361), we get a palindrome (2949842489492).

The spelling of 1636441043131 in words is "one trillion, six hundred thirty-six billion, four hundred forty-one million, forty-three thousand, one hundred thirty-one".