80514951866 has 4 divisors (see below), whose sum is σ = 120772427802. Its totient is φ = 40257475932.

The previous prime is 80514951851. The next prime is 80514951883. The reversal of 80514951866 is 66815941508.

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., 75366171841 + 5148780025 = 274529^2 + 71755^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20128737965 + ... + 20128737968.

Almost surely, 2^80514951866 is an apocalyptic number.

80514951866 is a deficient number, since it is larger than the sum of its proper divisors (40257475936).

80514951866 is a wasteful number, since it uses less digits than its factorization.

80514951866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40257475935.

The product of its (nonzero) digits is 2073600, while the sum is 53.

The spelling of 80514951866 in words is "eighty billion, five hundred fourteen million, nine hundred fifty-one thousand, eight hundred sixty-six".