28181008163055 has 64 divisors (see below), whose sum is σ = 49220847452160. Its totient is φ = 13654584028800.

The previous prime is 28181008163051. The next prime is 28181008163057. The reversal of 28181008163055 is 55036180018182.

It is not a de Polignac number, because 28181008163055 - 2² = 28181008163051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28181008162995 and 28181008163013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28181008163051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1925056426 + ... + 1925071064.

It is an arithmetic number, because the mean of its divisors is an integer number (769075741440).

Almost surely, 2^{28181008163055} is an apocalyptic number.

28181008163055 is a deficient number, since it is larger than the sum of its proper divisors (21039839289105).

28181008163055 is a wasteful number, since it uses less digits than its factorization.

28181008163055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21492.

The product of its (nonzero) digits is 460800, while the sum is 48.

The spelling of 28181008163055 in words is "twenty-eight trillion, one hundred eighty-one billion, eight million, one hundred sixty-three thousand, fifty-five".