80073680021 has 2 divisors, whose sum is σ = 80073680022. Its totient is φ = 80073680020.

The previous prime is 80073679999. The next prime is 80073680069. The reversal of 80073680021 is 12008637008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77167284100 + 2906395921 = 277790^2 + 53911^2 .

It is a cyclic number.

It is not a de Polignac number, because 80073680021 - 2⁶ = 80073679957 is a prime.

It is a super-4 number, since 4×80073680021⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80073680221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40036840010 + 40036840011.

It is an arithmetic number, because the mean of its divisors is an integer number (40036840011).

Almost surely, 2^80073680021 is an apocalyptic number.

It is an amenable number.

80073680021 is a deficient number, since it is larger than the sum of its proper divisors (1).

80073680021 is an equidigital number, since it uses as much as digits as its factorization.

80073680021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 80073680021 in words is "eighty billion, seventy-three million, six hundred eighty thousand, twenty-one".