115908563761 has 4 divisors (see below), whose sum is σ = 116109445732. Its totient is φ = 115707681792.

The previous prime is 115908563747. The next prime is 115908563831. The reversal of 115908563761 is 167365809511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167365809511 = 31 ⋅5398897081.

It can be written as a sum of positive squares in 2 ways, for example, as 70413806736 + 45494757025 = 265356^2 + 213295^2 .

It is a cyclic number.

It is not a de Polignac number, because 115908563761 - 2³¹ = 113761080113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115908563699 and 115908563708.

It is not an unprimeable number, because it can be changed into a prime (115908563461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100440120 + ... + 100441273.

It is an arithmetic number, because the mean of its divisors is an integer number (29027361433).

Almost surely, 2^115908563761 is an apocalyptic number.

It is an amenable number.

115908563761 is a deficient number, since it is larger than the sum of its proper divisors (200881971).

115908563761 is an equidigital number, since it uses as much as digits as its factorization.

115908563761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200881970.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 115908563761 in words is "one hundred fifteen billion, nine hundred eight million, five hundred sixty-three thousand, seven hundred sixty-one".