80050505561 has 4 divisors (see below), whose sum is σ = 86208236772. Its totient is φ = 73892774352.

The previous prime is 80050505551. The next prime is 80050505603. The reversal of 80050505561 is 16550505008.

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 33610255561 + 46440250000 = 183331^2 + 215500^2 .

It is a cyclic number.

It is not a de Polignac number, because 80050505561 - 2¹⁴ = 80050489177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80050505531) 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, 3078865586 + ... + 3078865611.

It is an arithmetic number, because the mean of its divisors is an integer number (21552059193).

Almost surely, 2^80050505561 is an apocalyptic number.

It is an amenable number.

80050505561 is a deficient number, since it is larger than the sum of its proper divisors (6157731211).

80050505561 is a wasteful number, since it uses less digits than its factorization.

80050505561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6157731210.

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 80050505561 in words is "eighty billion, fifty million, five hundred five thousand, five hundred sixty-one".