80605404361 has 4 divisors (see below), whose sum is σ = 80696898324. Its totient is φ = 80513910400.

The previous prime is 80605404359. The next prime is 80605404367. The reversal of 80605404361 is 16340450608.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51822246025 + 28783158336 = 227645^2 + 169656^2 .

It is a cyclic number.

It is not a de Polignac number, because 80605404361 - 2¹ = 80605404359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80605404361.

It is not an unprimeable number, because it can be changed into a prime (80605404367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45745660 + ... + 45747421.

It is an arithmetic number, because the mean of its divisors is an integer number (20174224581).

Almost surely, 2^80605404361 is an apocalyptic number.

It is an amenable number.

80605404361 is a deficient number, since it is larger than the sum of its proper divisors (91493963).

80605404361 is an equidigital number, since it uses as much as digits as its factorization.

80605404361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91493962.

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 80605404361 its reverse (16340450608), we get a palindrome (96945854969).

The spelling of 80605404361 in words is "eighty billion, six hundred five million, four hundred four thousand, three hundred sixty-one".