80168686042 has 4 divisors (see below), whose sum is σ = 120253029066. Its totient is φ = 40084343020.

The previous prime is 80168686007. The next prime is 80168686061. The reversal of 80168686042 is 24068686108.

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

It can be written as a sum of positive squares in only one way, i.e., 79732252161 + 436433881 = 282369^2 + 20891^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20042171509 + ... + 20042171512.

Almost surely, 2^80168686042 is an apocalyptic number.

80168686042 is a deficient number, since it is larger than the sum of its proper divisors (40084343024).

80168686042 is a wasteful number, since it uses less digits than its factorization.

80168686042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40084343023.

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 80168686042 in words is "eighty billion, one hundred sixty-eight million, six hundred eighty-six thousand, forty-two".