28108946171 has 2 divisors, whose sum is σ = 28108946172. Its totient is φ = 28108946170.

The previous prime is 28108946149. The next prime is 28108946179. The reversal of 28108946171 is 17164980182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28108946171 - 2²² = 28104751867 is a prime.

It is a super-2 number, since 2×28108946171² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28108946179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14054473085 + 14054473086.

It is an arithmetic number, because the mean of its divisors is an integer number (14054473086).

Almost surely, 2^28108946171 is an apocalyptic number.

28108946171 is a deficient number, since it is larger than the sum of its proper divisors (1).

28108946171 is an equidigital number, since it uses as much as digits as its factorization.

28108946171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 47.

The spelling of 28108946171 in words is "twenty-eight billion, one hundred eight million, nine hundred forty-six thousand, one hundred seventy-one".