80921333828 has 6 divisors (see below), whose sum is σ = 141612334206. Its totient is φ = 40460666912.

The previous prime is 80921333827. The next prime is 80921333833. The reversal of 80921333828 is 82833312908.

It can be written as a sum of positive squares in only one way, i.e., 44336355844 + 36584977984 = 210562^2 + 191272^2 .

It is not an unprimeable number, because it can be changed into a prime (80921333821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10115166725 + ... + 10115166732.

It is an arithmetic number, because the mean of its divisors is an integer number (23602055701).

Almost surely, 2^80921333828 is an apocalyptic number.

It is an amenable number.

80921333828 is a deficient number, since it is larger than the sum of its proper divisors (60691000378).

80921333828 is a wasteful number, since it uses less digits than its factorization.

80921333828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20230333461 (or 20230333459 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 80921333828 in words is "eighty billion, nine hundred twenty-one million, three hundred thirty-three thousand, eight hundred twenty-eight".