80512178 has 8 divisors (see below), whose sum is σ = 124932780. Its totient is φ = 38867920.

The previous prime is 80512171. The next prime is 80512181. The reversal of 80512178 is 87121508.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73736569 + 6775609 = 8587^2 + 2603^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (80512171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694013 + ... + 694128.

Almost surely, 2^80512178 is an apocalyptic number.

80512178 is a deficient number, since it is larger than the sum of its proper divisors (44420602).

80512178 is a wasteful number, since it uses less digits than its factorization.

80512178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388172.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 80512178 is about 8972.8578502058. The cubic root of 80512178 is about 431.8045276206.

The spelling of 80512178 in words is "eighty million, five hundred twelve thousand, one hundred seventy-eight".