115518278731249 has 9 divisors (see below), whose sum is σ = 115588989706827. Its totient is φ = 115447611006024.

The previous prime is 115518278731241. The next prime is 115518278731313. The reversal of 115518278731249 is 942137872815511.

The square root of 115518278731249 is 10747943.

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

It can be written as a sum of positive squares in only one way, i.e., 97841871165025 + 17676407566224 = 9891505^2 + 4204332^2 .

It is not a de Polignac number, because 115518278731249 - 2³ = 115518278731241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115518278731241) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 32641501122 + ... + 32641504660.

Almost surely, 2^{115518278731249} is an apocalyptic number.

115518278731249 is the 10747943-rd square number.

115518278731249 is the 5373972-nd centered octagonal number.

It is an amenable number.

115518278731249 is a deficient number, since it is larger than the sum of its proper divisors (70710975578).

115518278731249 is an frugal number, since it uses more digits than its factorization.

115518278731249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13152 (or 6576 counting only the distinct ones).

The product of its digits is 33868800, while the sum is 64.

The spelling of 115518278731249 in words is "one hundred fifteen trillion, five hundred eighteen billion, two hundred seventy-eight million, seven hundred thirty-one thousand, two hundred forty-nine".