115555660205520 has 160 divisors (see below), whose sum is σ = 367337631636864. Its totient is φ = 30032297574400.

The previous prime is 115555660205477. The next prime is 115555660205521. The reversal of 115555660205520 is 25502066555511.

It is a super-3 number, since 3×115555660205520³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 115555660205520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115555660205521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3507544 + ... + 15601736.

Almost surely, 2^{115555660205520} is an apocalyptic number.

115555660205520 is a gapful number since it is divisible by the number (10) 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 115555660205520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183668815818432).

115555660205520 is an abundant number, since it is smaller than the sum of its proper divisors (251781971431344).

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

115555660205520 is a wasteful number, since it uses less digits than its factorization.

115555660205520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12095221 (or 12095215 counting only the distinct ones).

The product of its (nonzero) digits is 2250000, while the sum is 48.

The spelling of 115555660205520 in words is "one hundred fifteen trillion, five hundred fifty-five billion, six hundred sixty million, two hundred five thousand, five hundred twenty".