80609678 has 4 divisors (see below), whose sum is σ = 120914520. Its totient is φ = 40304838.

The previous prime is 80609677. The next prime is 80609719. The reversal of 80609678 is 87690608.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80609677) 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 as a sum of consecutive naturals, namely, 20152418 + ... + 20152421.

It is an arithmetic number, because the mean of its divisors is an integer number (30228630).

Almost surely, 2^80609678 is an apocalyptic number.

80609678 is a deficient number, since it is larger than the sum of its proper divisors (40304842).

80609678 is a wasteful number, since it uses less digits than its factorization.

80609678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40304841.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 80609678 is about 8978.2892579823. The cubic root of 80609678 is about 431.9787619589.

The spelling of 80609678 in words is "eighty million, six hundred nine thousand, six hundred seventy-eight".