115521384136 has 8 divisors (see below), whose sum is σ = 216602595270. Its totient is φ = 57760692064.

The previous prime is 115521384133. The next prime is 115521384151. The reversal of 115521384136 is 631483125511.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61506976036 + 54014408100 = 248006^2 + 232410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (115521384133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7220086501 + ... + 7220086516.

Almost surely, 2^115521384136 is an apocalyptic number.

It is an amenable number.

115521384136 is a deficient number, since it is larger than the sum of its proper divisors (101081211134).

115521384136 is a wasteful number, since it uses less digits than its factorization.

115521384136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14440173023 (or 14440173019 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The spelling of 115521384136 in words is "one hundred fifteen billion, five hundred twenty-one million, three hundred eighty-four thousand, one hundred thirty-six".