113864412581 has 4 divisors (see below), whose sum is σ = 114375015552. Its totient is φ = 113353809612.

The previous prime is 113864412569. The next prime is 113864412583. The reversal of 113864412581 is 185214468311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 185214468311 = 265787 ⋅696853.

It is a cyclic number.

It is not a de Polignac number, because 113864412581 - 2¹⁴ = 113864396197 is a prime.

It is a super-2 number, since 2×113864412581² (a number of 23 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 (113864412583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255301151 + ... + 255301596.

It is an arithmetic number, because the mean of its divisors is an integer number (28593753888).

Almost surely, 2^113864412581 is an apocalyptic number.

It is an amenable number.

113864412581 is a deficient number, since it is larger than the sum of its proper divisors (510602971).

113864412581 is an equidigital number, since it uses as much as digits as its factorization.

113864412581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510602970.

The product of its digits is 184320, while the sum is 44.

The spelling of 113864412581 in words is "one hundred thirteen billion, eight hundred sixty-four million, four hundred twelve thousand, five hundred eighty-one".