161115105506055 has 32 divisors (see below), whose sum is σ = 272997781113024. Its totient is φ = 80858698008576.

The previous prime is 161115105506029. The next prime is 161115105506059. The reversal of 161115105506055 is 550605501511161.

It is not a de Polignac number, because 161115105506055 - 2¹⁴ = 161115105489671 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161115105505998 and 161115105506016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161115105506059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56283112 + ... + 59076381.

It is an arithmetic number, because the mean of its divisors is an integer number (8531180659782).

Almost surely, 2^{161115105506055} is an apocalyptic number.

161115105506055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161115105506055 is a deficient number, since it is larger than the sum of its proper divisors (111882675606969).

161115105506055 is a wasteful number, since it uses less digits than its factorization.

161115105506055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115364995.

The product of its (nonzero) digits is 112500, while the sum is 42.

The spelling of 161115105506055 in words is "one hundred sixty-one trillion, one hundred fifteen billion, one hundred five million, five hundred six thousand, fifty-five".