11375525681 has 4 divisors (see below), whose sum is σ = 12250566132. Its totient is φ = 10500485232.

The previous prime is 11375525617. The next prime is 11375525699. The reversal of 11375525681 is 18652557311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18652557311 = 109 ⋅171124379.

It can be written as a sum of positive squares in 2 ways, for example, as 6421618225 + 4953907456 = 80135^2 + 70384^2 .

It is a cyclic number.

It is not a de Polignac number, because 11375525681 - 2⁶ = 11375525617 is a prime.

It is a super-2 number, since 2×11375525681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11375521681) 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, 437520206 + ... + 437520231.

It is an arithmetic number, because the mean of its divisors is an integer number (3062641533).

Almost surely, 2^11375525681 is an apocalyptic number.

It is an amenable number.

11375525681 is a deficient number, since it is larger than the sum of its proper divisors (875040451).

11375525681 is an equidigital number, since it uses as much as digits as its factorization.

11375525681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875040450.

The product of its digits is 252000, while the sum is 44.

The spelling of 11375525681 in words is "eleven billion, three hundred seventy-five million, five hundred twenty-five thousand, six hundred eighty-one".