80434974925681 has 2 divisors, whose sum is σ = 80434974925682. Its totient is φ = 80434974925680.

The previous prime is 80434974925631. The next prime is 80434974925729. The reversal of 80434974925681 is 18652947943408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69734775040225 + 10700199885456 = 8350735^2 + 3271116^2 .

It is a cyclic number.

It is not a de Polignac number, because 80434974925681 - 2⁷ = 80434974925553 is a prime.

It is a super-2 number, since 2×80434974925681² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80434974925681.

It is not a weakly prime, because it can be changed into another prime (80434974925631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40217487462840 + 40217487462841.

It is an arithmetic number, because the mean of its divisors is an integer number (40217487462841).

It is a 1-persistent number, because it is pandigital, but 2⋅80434974925681 = 160869949851362 is not.

Almost surely, 2^{80434974925681} is an apocalyptic number.

It is an amenable number.

80434974925681 is a deficient number, since it is larger than the sum of its proper divisors (1).

80434974925681 is an equidigital number, since it uses as much as digits as its factorization.

80434974925681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 418037760, while the sum is 70.

The spelling of 80434974925681 in words is "eighty trillion, four hundred thirty-four billion, nine hundred seventy-four million, nine hundred twenty-five thousand, six hundred eighty-one".