115867839431881 has 4 divisors (see below), whose sum is σ = 115873527892500. Its totient is φ = 115862150971264.

The previous prime is 115867839431837. The next prime is 115867839431947. The reversal of 115867839431881 is 188134938768511.

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 61026172205625 + 54841667226256 = 7811925^2 + 7405516^2 .

It is a cyclic number.

It is not a de Polignac number, because 115867839431881 - 2⁹ = 115867839431369 is a prime.

It is a super-2 number, since 2×115867839431881² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115867839431801) 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, 2844199756 + ... + 2844240493.

It is an arithmetic number, because the mean of its divisors is an integer number (28968381973125).

Almost surely, 2^{115867839431881} is an apocalyptic number.

It is an amenable number.

115867839431881 is a deficient number, since it is larger than the sum of its proper divisors (5688460619).

115867839431881 is an equidigital number, since it uses as much as digits as its factorization.

115867839431881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688460618.

The product of its digits is 278691840, while the sum is 73.

The spelling of 115867839431881 in words is "one hundred fifteen trillion, eight hundred sixty-seven billion, eight hundred thirty-nine million, four hundred thirty-one thousand, eight hundred eighty-one".