115721664736 has 48 divisors (see below), whose sum is σ = 231421276800. Its totient is φ = 56953847808.

The previous prime is 115721664703. The next prime is 115721664743. The reversal of 115721664736 is 637466127511.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 115721664736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544000 + ... + 726208.

It is an arithmetic number, because the mean of its divisors is an integer number (4821276600).

Almost surely, 2^115721664736 is an apocalyptic number.

115721664736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

115721664736 is a deficient number, since it is larger than the sum of its proper divisors (115699612064).

115721664736 is a wasteful number, since it uses less digits than its factorization.

115721664736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182531 (or 182523 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The spelling of 115721664736 in words is "one hundred fifteen billion, seven hundred twenty-one million, six hundred sixty-four thousand, seven hundred thirty-six".