80168442056 has 24 divisors (see below), whose sum is σ = 155321157510. Its totient is φ = 38791177920.

The previous prime is 80168441993. The next prime is 80168442071. The reversal of 80168442056 is 65024486108.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40977904900 + 39190537156 = 202430^2 + 197966^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80168441998 and 80168442016.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5206181 + ... + 5221556.

Almost surely, 2^80168442056 is an apocalyptic number.

It is an amenable number.

80168442056 is a deficient number, since it is larger than the sum of its proper divisors (75152715454).

80168442056 is a wasteful number, since it uses less digits than its factorization.

80168442056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10427805 (or 10427770 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 80168442056 in words is "eighty billion, one hundred sixty-eight million, four hundred forty-two thousand, fifty-six".