80640134 has 4 divisors (see below), whose sum is σ = 120960204. Its totient is φ = 40320066.

The previous prime is 80640113. The next prime is 80640149. The reversal of 80640134 is 43104608.

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

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 20160032 + ... + 20160035.

It is an arithmetic number, because the mean of its divisors is an integer number (30240051).

Almost surely, 2^80640134 is an apocalyptic number.

80640134 is a deficient number, since it is larger than the sum of its proper divisors (40320070).

80640134 is a wasteful number, since it uses less digits than its factorization.

80640134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40320069.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 80640134 is about 8979.9851892974. The cubic root of 80640134 is about 432.0331586059.

The spelling of 80640134 in words is "eighty million, six hundred forty thousand, one hundred thirty-four".