28011681171 has 32 divisors (see below), whose sum is σ = 43798496000. Its totient is φ = 17644785984.

The previous prime is 28011681169. The next prime is 28011681179. The reversal of 28011681171 is 17118611082.

It is not a de Polignac number, because 28011681171 - 2¹ = 28011681169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28011681179) 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, 122391 + ... + 266463.

It is an arithmetic number, because the mean of its divisors is an integer number (1368703000).

Almost surely, 2^28011681171 is an apocalyptic number.

28011681171 is a deficient number, since it is larger than the sum of its proper divisors (15786814829).

28011681171 is a wasteful number, since it uses less digits than its factorization.

28011681171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144480 (or 144474 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 36.

The spelling of 28011681171 in words is "twenty-eight billion, eleven million, six hundred eighty-one thousand, one hundred seventy-one".