80145444561 has 16 divisors (see below), whose sum is σ = 131520729984. Its totient is φ = 42274520064.

The previous prime is 80145444541. The next prime is 80145444563. The reversal of 80145444561 is 16544454108.

It is not a de Polignac number, because 80145444561 - 2⁶ = 80145444497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80145444563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146786256 + ... + 146786801.

It is an arithmetic number, because the mean of its divisors is an integer number (8220045624).

Almost surely, 2^80145444561 is an apocalyptic number.

It is an amenable number.

80145444561 is a deficient number, since it is larger than the sum of its proper divisors (51375285423).

80145444561 is a wasteful number, since it uses less digits than its factorization.

80145444561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293573080.

The product of its (nonzero) digits is 307200, while the sum is 42.

Adding to 80145444561 its reverse (16544454108), we get a palindrome (96689898669).

The spelling of 80145444561 in words is "eighty billion, one hundred forty-five million, four hundred forty-four thousand, five hundred sixty-one".