802128106791 has 24 divisors (see below), whose sum is σ = 1264009204224. Its totient is φ = 486119106960.

The previous prime is 802128106783. The next prime is 802128106807. The reversal of 802128106791 is 197601821208.

It is not a de Polignac number, because 802128106791 - 2³ = 802128106783 is a prime.

It is a super-2 number, since 2×802128106791² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802128106711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2609290 + ... + 2900456.

It is an arithmetic number, because the mean of its divisors is an integer number (52667050176).

Almost surely, 2^802128106791 is an apocalyptic number.

802128106791 is a deficient number, since it is larger than the sum of its proper divisors (461881097433).

802128106791 is a wasteful number, since it uses less digits than its factorization.

802128106791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319011 (or 319008 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

Adding to 802128106791 its reverse (197601821208), we get a palindrome (999729927999).

The spelling of 802128106791 in words is "eight hundred two billion, one hundred twenty-eight million, one hundred six thousand, seven hundred ninety-one".