80335561 has 2 divisors, whose sum is σ = 80335562. Its totient is φ = 80335560.

The previous prime is 80335543. The next prime is 80335589. The reversal of 80335561 is 16553308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56715961 + 23619600 = 7531^2 + 4860^2 .

It is a cyclic number.

It is not a de Polignac number, because 80335561 - 2¹³ = 80327369 is a prime.

It is a super-2 number, since 2×80335561² = 12907604722369442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80339561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40167780 + 40167781.

It is an arithmetic number, because the mean of its divisors is an integer number (40167781).

Almost surely, 2^80335561 is an apocalyptic number.

It is an amenable number.

80335561 is a deficient number, since it is larger than the sum of its proper divisors (1).

80335561 is an equidigital number, since it uses as much as digits as its factorization.

80335561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 80335561 is about 8963.0107106931. The cubic root of 80335561 is about 431.4885511800.

Adding to 80335561 its reverse (16553308), we get a palindrome (96888869).

The spelling of 80335561 in words is "eighty million, three hundred thirty-five thousand, five hundred sixty-one".