80729564 has 6 divisors (see below), whose sum is σ = 141276744. Its totient is φ = 40364780.

The previous prime is 80729543. The next prime is 80729569. The reversal of 80729564 is 46592708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80729569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10091192 + ... + 10091199.

It is an arithmetic number, because the mean of its divisors is an integer number (23546124).

Almost surely, 2^80729564 is an apocalyptic number.

It is an amenable number.

80729564 is a deficient number, since it is larger than the sum of its proper divisors (60547180).

80729564 is a wasteful number, since it uses less digits than its factorization.

80729564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20182395 (or 20182393 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 80729564 is about 8984.9632163966. The cubic root of 80729564 is about 432.1928080242.

The spelling of 80729564 in words is "eighty million, seven hundred twenty-nine thousand, five hundred sixty-four".