115238661813 has 24 divisors (see below), whose sum is σ = 191145470880. Its totient is φ = 66165737760.

The previous prime is 115238661803. The next prime is 115238661833. The reversal of 115238661813 is 318166832511.

115238661813 is a `hidden beast` number, since 1 + 1 + 5 + 23 + 8 + 6 + 618 + 1 + 3 = 666.

It is not a de Polignac number, because 115238661813 - 2¹² = 115238657717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115238661803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30630406 + ... + 30634167.

It is an arithmetic number, because the mean of its divisors is an integer number (7964394620).

Almost surely, 2^115238661813 is an apocalyptic number.

It is an amenable number.

115238661813 is a deficient number, since it is larger than the sum of its proper divisors (75906809067).

115238661813 is a wasteful number, since it uses less digits than its factorization.

115238661813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61264609 (or 61264606 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 115238661813 in words is "one hundred fifteen billion, two hundred thirty-eight million, six hundred sixty-one thousand, eight hundred thirteen".