115540561536 has 64 divisors (see below), whose sum is σ = 307371002400. Its totient is φ = 38454993920.

The previous prime is 115540561501. The next prime is 115540561537. The reversal of 115540561536 is 635165045511.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (115540561537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24766 + ... + 481346.

Almost surely, 2^115540561536 is an apocalyptic number.

115540561536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115540561536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153685501200).

115540561536 is an abundant number, since it is smaller than the sum of its proper divisors (191830440864).

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

115540561536 is an equidigital number, since it uses as much as digits as its factorization.

115540561536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457257 (or 457245 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 42.

The spelling of 115540561536 in words is "one hundred fifteen billion, five hundred forty million, five hundred sixty-one thousand, five hundred thirty-six".