115779502081 has 4 divisors (see below), whose sum is σ = 115882053700. Its totient is φ = 115676950464.

The previous prime is 115779502079. The next prime is 115779502129. The reversal of 115779502081 is 180205977511.

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 64232340481 + 51547161600 = 253441^2 + 227040^2 .

It is a cyclic number.

It is not a de Polignac number, because 115779502081 - 2¹ = 115779502079 is a prime.

It is a super-2 number, since 2×115779502081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115779502001) 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, 51274116 + ... + 51276373.

It is an arithmetic number, because the mean of its divisors is an integer number (28970513425).

Almost surely, 2^115779502081 is an apocalyptic number.

It is an amenable number.

115779502081 is a deficient number, since it is larger than the sum of its proper divisors (102551619).

115779502081 is a wasteful number, since it uses less digits than its factorization.

115779502081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102551618.

The product of its (nonzero) digits is 176400, while the sum is 46.

The spelling of 115779502081 in words is "one hundred fifteen billion, seven hundred seventy-nine million, five hundred two thousand, eighty-one".