115863313509 has 12 divisors (see below), whose sum is σ = 171250169376. Its totient is φ = 75445878312.

The previous prime is 115863313507. The next prime is 115863313513. The reversal of 115863313509 is 905313368511.

115863313509 is a `hidden beast` number, since 1 + 1 + 5 + 8 + 633 + 1 + 3 + 5 + 0 + 9 = 666.

It is not a de Polignac number, because 115863313509 - 2¹ = 115863313507 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115863313507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149693817 + ... + 149694590.

It is an arithmetic number, because the mean of its divisors is an integer number (14270847448).

Almost surely, 2^115863313509 is an apocalyptic number.

It is an amenable number.

115863313509 is a deficient number, since it is larger than the sum of its proper divisors (55386855867).

115863313509 is a wasteful number, since it uses less digits than its factorization.

115863313509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299388456 (or 299388453 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 115863313509 in words is "one hundred fifteen billion, eight hundred sixty-three million, three hundred thirteen thousand, five hundred nine".