115663311220 has 24 divisors (see below), whose sum is σ = 243159614208. Its totient is φ = 46214532000.

The previous prime is 115663311217. The next prime is 115663311227. The reversal of 115663311220 is 22113366511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115663311227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3155856 + ... + 3192295.

It is an arithmetic number, because the mean of its divisors is an integer number (10131650592).

Almost surely, 2^115663311220 is an apocalyptic number.

115663311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115663311220 is an abundant number, since it is smaller than the sum of its proper divisors (127496302988).

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

115663311220 is a wasteful number, since it uses less digits than its factorization.

115663311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349071 (or 6349069 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 115663311220 its reverse (22113366511), we get a palindrome (137776677731).

The spelling of 115663311220 in words is "one hundred fifteen billion, six hundred sixty-three million, three hundred eleven thousand, two hundred twenty".