80402347349981 has 2 divisors, whose sum is σ = 80402347349982. Its totient is φ = 80402347349980.

The previous prime is 80402347349959. The next prime is 80402347350113. The reversal of 80402347349981 is 18994374320408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68169379425625 + 12232967924356 = 8256475^2 + 3497566^2 .

It is a cyclic number.

It is not a de Polignac number, because 80402347349981 - 2⁶ = 80402347349917 is a prime.

It is a super-2 number, since 2×80402347349981² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80402347349911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40201173674990 + 40201173674991.

It is an arithmetic number, because the mean of its divisors is an integer number (40201173674991).

Almost surely, 2^{80402347349981} is an apocalyptic number.

It is an amenable number.

80402347349981 is a deficient number, since it is larger than the sum of its proper divisors (1).

80402347349981 is an equidigital number, since it uses as much as digits as its factorization.

80402347349981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 62.

The spelling of 80402347349981 in words is "eighty trillion, four hundred two billion, three hundred forty-seven million, three hundred forty-nine thousand, nine hundred eighty-one".