115563321720 has 192 divisors, whose sum is σ = 468256688640. Its totient is φ = 24013152000.

The previous prime is 115563321659. The next prime is 115563321733. The reversal of 115563321720 is 27123365511.

115563321720 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 633 + 2 + 17 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2056756 + ... + 2112195.

It is an arithmetic number, because the mean of its divisors is an integer number (2438836920).

Almost surely, 2^115563321720 is an apocalyptic number.

115563321720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115563321720 is an abundant number, since it is smaller than the sum of its proper divisors (352693366920).

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

115563321720 is a wasteful number, since it uses less digits than its factorization.

115563321720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168986 (or 4168979 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The spelling of 115563321720 in words is "one hundred fifteen billion, five hundred sixty-three million, three hundred twenty-one thousand, seven hundred twenty".