28171409155 has 32 divisors (see below), whose sum is σ = 38024078400. Its totient is φ = 19910541312.

The previous prime is 28171409137. The next prime is 28171409179. The reversal of 28171409155 is 55190417182.

It is a cyclic number.

It is not a de Polignac number, because 28171409155 - 2¹¹ = 28171407107 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96019 + ... + 256051.

It is an arithmetic number, because the mean of its divisors is an integer number (1188252450).

Almost surely, 2^28171409155 is an apocalyptic number.

28171409155 is a deficient number, since it is larger than the sum of its proper divisors (9852669245).

28171409155 is a wasteful number, since it uses less digits than its factorization.

28171409155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160183.

The product of its (nonzero) digits is 100800, while the sum is 43.

The spelling of 28171409155 in words is "twenty-eight billion, one hundred seventy-one million, four hundred nine thousand, one hundred fifty-five".