115516420205 has 4 divisors (see below), whose sum is σ = 138619704252. Its totient is φ = 92413136160.

The previous prime is 115516420177. The next prime is 115516420241. The reversal of 115516420205 is 502024615511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502024615511 = 719 ⋅698226169.

It can be written as a sum of positive squares in 2 ways, for example, as 82797760516 + 32718659689 = 287746^2 + 180883^2 .

It is not a de Polignac number, because 115516420205 - 2¹⁰ = 115516419181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11551642016 + ... + 11551642025.

It is an arithmetic number, because the mean of its divisors is an integer number (34654926063).

Almost surely, 2^115516420205 is an apocalyptic number.

It is an amenable number.

115516420205 is a deficient number, since it is larger than the sum of its proper divisors (23103284047).

115516420205 is an equidigital number, since it uses as much as digits as its factorization.

115516420205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23103284046.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 115516420205 in words is "one hundred fifteen billion, five hundred sixteen million, four hundred twenty thousand, two hundred five".