80642678 has 8 divisors (see below), whose sum is σ = 125135280. Its totient is φ = 38930920.

The previous prime is 80642659. The next prime is 80642689. The reversal of 80642678 is 87624608.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695138 + ... + 695253.

It is an arithmetic number, because the mean of its divisors is an integer number (15641910).

Almost surely, 2^80642678 is an apocalyptic number.

80642678 is a deficient number, since it is larger than the sum of its proper divisors (44492602).

80642678 is a wasteful number, since it uses less digits than its factorization.

80642678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390422.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 80642678 is about 8980.1268365207. The cubic root of 80642678 is about 432.0377017564.

The spelling of 80642678 in words is "eighty million, six hundred forty-two thousand, six hundred seventy-eight".