80043726705218 has 4 divisors (see below), whose sum is σ = 120065590057830. Its totient is φ = 40021863352608.

The previous prime is 80043726705199. The next prime is 80043726705307. The reversal of 80043726705218 is 81250762734008.

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

It can be written as a sum of positive squares in only one way, i.e., 69083409359449 + 10960317345769 = 8311643^2 + 3310637^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 80043726705218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010931676303 + ... + 20010931676306.

Almost surely, 2^{80043726705218} is an apocalyptic number.

80043726705218 is a deficient number, since it is larger than the sum of its proper divisors (40021863352612).

80043726705218 is a wasteful number, since it uses less digits than its factorization.

80043726705218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40021863352611.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 80043726705218 in words is "eighty trillion, forty-three billion, seven hundred twenty-six million, seven hundred five thousand, two hundred eighteen".