115505120155 has 8 divisors (see below), whose sum is σ = 141829543152. Its totient is φ = 90255163488.

The previous prime is 115505120153. The next prime is 115505120281. The reversal of 115505120155 is 551021505511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115505120155 - 2¹ = 115505120153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115505120153) 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, 268616344 + ... + 268616773.

It is an arithmetic number, because the mean of its divisors is an integer number (17728692894).

Almost surely, 2^115505120155 is an apocalyptic number.

115505120155 is a deficient number, since it is larger than the sum of its proper divisors (26324422997).

115505120155 is an equidigital number, since it uses as much as digits as its factorization.

115505120155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537233165.

The product of its (nonzero) digits is 6250, while the sum is 31.

Adding to 115505120155 its reverse (551021505511), we get a palindrome (666526625666).

The spelling of 115505120155 in words is "one hundred fifteen billion, five hundred five million, one hundred twenty thousand, one hundred fifty-five".