27180228371855 has 16 divisors (see below), whose sum is σ = 35127684155424. Its totient is φ = 20070144144000.

The previous prime is 27180228371851. The next prime is 27180228371893. The reversal of 27180228371855 is 55817382208172.

It is not a de Polignac number, because 27180228371855 - 2² = 27180228371851 is a prime.

It is a super-2 number, since 2×27180228371855² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27180228371794 and 27180228371803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27180228371851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13744844 + ... + 15597473.

It is an arithmetic number, because the mean of its divisors is an integer number (2195480259714).

Almost surely, 2^{27180228371855} is an apocalyptic number.

27180228371855 is a deficient number, since it is larger than the sum of its proper divisors (7947455783569).

27180228371855 is a wasteful number, since it uses less digits than its factorization.

27180228371855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29356586.

The product of its (nonzero) digits is 15052800, while the sum is 59.

The spelling of 27180228371855 in words is "twenty-seven trillion, one hundred eighty billion, two hundred twenty-eight million, three hundred seventy-one thousand, eight hundred fifty-five".