115515655605 has 80 divisors (see below), whose sum is σ = 250575240960. Its totient is φ = 49700832768.

The previous prime is 115515655603. The next prime is 115515655627. The reversal of 115515655605 is 506556515511.

115515655605 is a `hidden beast` number, since 1 + 15 + 5 + 15 + 65 + 560 + 5 = 666.

It is not a de Polignac number, because 115515655605 - 2¹ = 115515655603 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115515655603) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1150225 + ... + 1246614.

It is an arithmetic number, because the mean of its divisors is an integer number (3132190512).

Almost surely, 2^115515655605 is an apocalyptic number.

115515655605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115515655605 is an abundant number, since it is smaller than the sum of its proper divisors (135059585355).

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

115515655605 is a wasteful number, since it uses less digits than its factorization.

115515655605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396880 (or 2396871 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 45.

The spelling of 115515655605 in words is "one hundred fifteen billion, five hundred fifteen million, six hundred fifty-five thousand, six hundred five".