80643718 has 8 divisors (see below), whose sum is σ = 121020840. Its totient is φ = 40303440.

The previous prime is 80643697. The next prime is 80643721. The reversal of 80643718 is 81734608.

It is a happy number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2863 + ... + 13018.

It is an arithmetic number, because the mean of its divisors is an integer number (15127605).

Almost surely, 2^80643718 is an apocalyptic number.

80643718 is a deficient number, since it is larger than the sum of its proper divisors (40377122).

80643718 is a wasteful number, since it uses less digits than its factorization.

80643718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18422.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 80643718 is about 8980.1847419750. The cubic root of 80643718 is about 432.0395589917.

The spelling of 80643718 in words is "eighty million, six hundred forty-three thousand, seven hundred eighteen".