828666643161 has 32 divisors (see below), whose sum is σ = 1266809644800. Its totient is φ = 471994972416.

The previous prime is 828666643159. The next prime is 828666643193. The reversal of 828666643161 is 161346666828.

It is not a de Polignac number, because 828666643161 - 2¹ = 828666643159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (828666643111) 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, 21652735 + ... + 21690971.

It is an arithmetic number, because the mean of its divisors is an integer number (39587801400).

Almost surely, 2^828666643161 is an apocalyptic number.

It is an amenable number.

828666643161 is a deficient number, since it is larger than the sum of its proper divisors (438143001639).

828666643161 is a wasteful number, since it uses less digits than its factorization.

828666643161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41553.

The product of its digits is 11943936, while the sum is 57.

The spelling of 828666643161 in words is "eight hundred twenty-eight billion, six hundred sixty-six million, six hundred forty-three thousand, one hundred sixty-one".