115391831559481 has 27 divisors (see below), whose sum is σ = 117469738581741. Its totient is φ = 113350550313888.

The previous prime is 115391831559479. The next prime is 115391831559553. The reversal of 115391831559481 is 184955138193511.

It is a happy number.

The square root of 115391831559481 is 10742059.

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

It can be written as a sum of positive squares in 4 ways, for example, as 4965360999481 + 110426470560000 = 2228309^2 + 10508400^2 .

It is not a de Polignac number, because 115391831559481 - 2¹ = 115391831559479 is a prime.

It is a super-2 number, since 2×115391831559481² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115391831559281) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 162752935555 + ... + 162752936263.

It is an arithmetic number, because the mean of its divisors is an integer number (4350731058583).

Almost surely, 2^{115391831559481} is an apocalyptic number.

115391831559481 is the 10742059-th square number.

115391831559481 is the 5371030-th centered octagonal number.

It is an amenable number.

115391831559481 is a deficient number, since it is larger than the sum of its proper divisors (2077907022260).

115391831559481 is an frugal number, since it uses more digits than its factorization.

115391831559481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914 (or 957 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 64.

The spelling of 115391831559481 in words is "one hundred fifteen trillion, three hundred ninety-one billion, eight hundred thirty-one million, five hundred fifty-nine thousand, four hundred eighty-one".