115661522425 has 6 divisors (see below), whose sum is σ = 143420287838. Its totient is φ = 92529217920.

The previous prime is 115661522407. The next prime is 115661522429. The reversal of 115661522425 is 524225166511.

It can be written as a sum of positive squares in 3 ways, for example, as 962798841 + 114698723584 = 31029^2 + 338672^2 .

It is not a de Polignac number, because 115661522425 - 2¹⁹ = 115660998137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115661522429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2313230424 + ... + 2313230473.

Almost surely, 2^115661522425 is an apocalyptic number.

It is an amenable number.

115661522425 is a deficient number, since it is larger than the sum of its proper divisors (27758765413).

115661522425 is an equidigital number, since it uses as much as digits as its factorization.

115661522425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626460907 (or 4626460902 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

Adding to 115661522425 its reverse (524225166511), we get a palindrome (639886688936).

The spelling of 115661522425 in words is "one hundred fifteen billion, six hundred sixty-one million, five hundred twenty-two thousand, four hundred twenty-five".