115415666516 has 24 divisors (see below), whose sum is σ = 215299056000. Its totient is φ = 53978543424.

The previous prime is 115415666503. The next prime is 115415666519. The reversal of 115415666516 is 615666514511.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115415666519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9605561 + ... + 9617568.

It is an arithmetic number, because the mean of its divisors is an integer number (8970794000).

Almost surely, 2^115415666516 is an apocalyptic number.

It is an amenable number.

115415666516 is a deficient number, since it is larger than the sum of its proper divisors (99883389484).

115415666516 is a wasteful number, since it uses less digits than its factorization.

115415666516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19223231 (or 19223229 counting only the distinct ones).

The product of its digits is 648000, while the sum is 47.

The spelling of 115415666516 in words is "one hundred fifteen billion, four hundred fifteen million, six hundred sixty-six thousand, five hundred sixteen".