115863644161 has 4 divisors (see below), whose sum is σ = 117827434800. Its totient is φ = 113899853524.

The previous prime is 115863644159. The next prime is 115863644173. The reversal of 115863644161 is 161446368511.

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.

It is a cyclic number.

It is not a de Polignac number, because 115863644161 - 2¹ = 115863644159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115863644101) 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, 981895231 + ... + 981895348.

It is an arithmetic number, because the mean of its divisors is an integer number (29456858700).

Almost surely, 2^115863644161 is an apocalyptic number.

It is an amenable number.

115863644161 is a deficient number, since it is larger than the sum of its proper divisors (1963790639).

115863644161 is an equidigital number, since it uses as much as digits as its factorization.

115863644161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963790638.

The product of its digits is 414720, while the sum is 46.

The spelling of 115863644161 in words is "one hundred fifteen billion, eight hundred sixty-three million, six hundred forty-four thousand, one hundred sixty-one".