80264997867581 has 2 divisors, whose sum is σ = 80264997867582. Its totient is φ = 80264997867580.

The previous prime is 80264997867577. The next prime is 80264997867647. The reversal of 80264997867581 is 18576879946208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74991962844100 + 5273035023481 = 8659790^2 + 2296309^2 .

It is a cyclic number.

It is not a de Polignac number, because 80264997867581 - 2² = 80264997867577 is a prime.

It is a super-2 number, since 2×80264997867581² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80264997867496 and 80264997867505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80264997867521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40132498933790 + 40132498933791.

It is an arithmetic number, because the mean of its divisors is an integer number (40132498933791).

Almost surely, 2^{80264997867581} is an apocalyptic number.

It is an amenable number.

80264997867581 is a deficient number, since it is larger than the sum of its proper divisors (1).

80264997867581 is an equidigital number, since it uses as much as digits as its factorization.

80264997867581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2926264320, while the sum is 80.

The spelling of 80264997867581 in words is "eighty trillion, two hundred sixty-four billion, nine hundred ninety-seven million, eight hundred sixty-seven thousand, five hundred eighty-one".