80278155556 has 9 divisors (see below), whose sum is σ = 140487763899. Its totient is φ = 40138794444.

The previous prime is 80278155533. The next prime is 80278155571. The reversal of 80278155556 is 65555187208.

The square root of 80278155556 is 283334.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 495835 + ... + 637501.

Almost surely, 2^80278155556 is an apocalyptic number.

80278155556 is the 283334-th square number.

It is an amenable number.

80278155556 is a deficient number, since it is larger than the sum of its proper divisors (60209608343).

80278155556 is an frugal number, since it uses more digits than its factorization.

80278155556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283338 (or 141669 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 52.

The spelling of 80278155556 in words is "eighty billion, two hundred seventy-eight million, one hundred fifty-five thousand, five hundred fifty-six".