80641178719 has 4 divisors (see below), whose sum is σ = 80649577096. Its totient is φ = 80632780344.

The previous prime is 80641178677. The next prime is 80641178743. The reversal of 80641178719 is 91787114608.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 80641178719 - 2¹⁵ = 80641145951 is a prime.

It is a super-2 number, since 2×80641178719² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80641178749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4184769 + ... + 4203994.

It is an arithmetic number, because the mean of its divisors is an integer number (20162394274).

Almost surely, 2^80641178719 is an apocalyptic number.

80641178719 is a deficient number, since it is larger than the sum of its proper divisors (8398377).

80641178719 is an equidigital number, since it uses as much as digits as its factorization.

80641178719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8398376.

The product of its (nonzero) digits is 677376, while the sum is 52.

The spelling of 80641178719 in words is "eighty billion, six hundred forty-one million, one hundred seventy-eight thousand, seven hundred nineteen".