80561461 has 2 divisors, whose sum is σ = 80561462. Its totient is φ = 80561460.

The previous prime is 80561417. The next prime is 80561473. The reversal of 80561461 is 16416508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46991025 + 33570436 = 6855^2 + 5794^2 .

It is a cyclic number.

It is not a de Polignac number, because 80561461 - 2²³ = 72172853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80561401) 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, 40280730 + 40280731.

It is an arithmetic number, because the mean of its divisors is an integer number (40280731).

Almost surely, 2^80561461 is an apocalyptic number.

It is an amenable number.

80561461 is a deficient number, since it is larger than the sum of its proper divisors (1).

80561461 is an equidigital number, since it uses as much as digits as its factorization.

80561461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 80561461 is about 8975.6036565793. The cubic root of 80561461 is about 431.8926148411.

Adding to 80561461 its reverse (16416508), we get a palindrome (96977969).

The spelling of 80561461 in words is "eighty million, five hundred sixty-one thousand, four hundred sixty-one".