28917166851 has 12 divisors (see below), whose sum is σ = 41780395800. Its totient is φ = 19272962880.

The previous prime is 28917166847. The next prime is 28917166871. The reversal of 28917166851 is 15866171982.

It is a happy number.

It is not a de Polignac number, because 28917166851 - 2² = 28917166847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28917166801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 393301 + ... + 460998.

It is an arithmetic number, because the mean of its divisors is an integer number (3481699650).

Almost surely, 2^28917166851 is an apocalyptic number.

28917166851 is a deficient number, since it is larger than the sum of its proper divisors (12863228949).

28917166851 is a wasteful number, since it uses less digits than its factorization.

28917166851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858066 (or 858063 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The spelling of 28917166851 in words is "twenty-eight billion, nine hundred seventeen million, one hundred sixty-six thousand, eight hundred fifty-one".