115687736641 has 3 divisors (see below), whose sum is σ = 115688076771. Its totient is φ = 115687396512.

The previous prime is 115687736587. The next prime is 115687736701. The reversal of 115687736641 is 146637786511.

The square root of 115687736641 is 340129.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 146637786511 = 6217 ⋅23586583.

It can be written as a sum of positive squares in only one way, i.e., 8523167041 + 107164569600 = 92321^2 + 327360^2 .

It is not a de Polignac number, because 115687736641 - 2⁷ = 115687736513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115687796641) 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 2 ways as a sum of consecutive naturals, for example, 170065 + ... + 510193.

It is an arithmetic number, because the mean of its divisors is an integer number (38562692257).

Almost surely, 2^115687736641 is an apocalyptic number.

115687736641 is the 340129-th square number.

115687736641 is the 170065-th centered octagonal number.

It is an amenable number.

115687736641 is a deficient number, since it is larger than the sum of its proper divisors (340130).

115687736641 is an frugal number, since it uses more digits than its factorization.

115687736641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680258 (or 340129 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 55.

The spelling of 115687736641 in words is "one hundred fifteen billion, six hundred eighty-seven million, seven hundred thirty-six thousand, six hundred forty-one".