115691403123 has 24 divisors (see below), whose sum is σ = 180659258000. Its totient is φ = 71093433024.

The previous prime is 115691403109. The next prime is 115691403127. The reversal of 115691403123 is 321304196511.

115691403123 is a `hidden beast` number, since 1 + 1 + 569 + 1 + 40 + 31 + 23 = 666.

It is not a de Polignac number, because 115691403123 - 2¹² = 115691399027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115691403127) 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, 9136348 + ... + 9149001.

Almost surely, 2^115691403123 is an apocalyptic number.

115691403123 is a deficient number, since it is larger than the sum of its proper divisors (64967854877).

115691403123 is a wasteful number, since it uses less digits than its factorization.

115691403123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18285411 (or 18285408 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

Adding to 115691403123 its reverse (321304196511), we get a palindrome (436995599634).

The spelling of 115691403123 in words is "one hundred fifteen billion, six hundred ninety-one million, four hundred three thousand, one hundred twenty-three".