115781536 has 24 divisors (see below), whose sum is σ = 245480004. Its totient is φ = 53437440.

The previous prime is 115781507. The next prime is 115781623. The reversal of 115781536 is 635187511.

It can be written as a sum of positive squares in 2 ways, for example, as 115691536 + 90000 = 10756^2 + 300^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 115781495 and 115781504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138745 + ... + 139576.

Almost surely, 2^115781536 is an apocalyptic number.

115781536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

115781536 is an abundant number, since it is smaller than the sum of its proper divisors (129698468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115781536 is a wasteful number, since it uses less digits than its factorization.

115781536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278344 (or 278336 counting only the distinct ones).

The product of its digits is 25200, while the sum is 37.

The square root of 115781536 is about 10760.1828980738. The cubic root of 115781536 is about 487.3935402859.

The spelling of 115781536 in words is "one hundred fifteen million, seven hundred eighty-one thousand, five hundred thirty-six".