11437940510681 has 4 divisors (see below), whose sum is σ = 11440326899892. Its totient is φ = 11435554121472.

The previous prime is 11437940510671. The next prime is 11437940510699. The reversal of 11437940510681 is 18601504973411.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5108142414400 + 6329798096281 = 2260120^2 + 2515909^2 .

It is a cyclic number.

It is not a de Polignac number, because 11437940510681 - 2¹⁰ = 11437940509657 is a prime.

It is a super-2 number, since 2×11437940510681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11437940510611) 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, 1193187416 + ... + 1193197001.

It is an arithmetic number, because the mean of its divisors is an integer number (2860081724973).

Almost surely, 2^{11437940510681} is an apocalyptic number.

It is an amenable number.

11437940510681 is a deficient number, since it is larger than the sum of its proper divisors (2386389211).

11437940510681 is an equidigital number, since it uses as much as digits as its factorization.

11437940510681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386389210.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 11437940510681 in words is "eleven trillion, four hundred thirty-seven billion, nine hundred forty million, five hundred ten thousand, six hundred eighty-one".