80740842005 has 4 divisors (see below), whose sum is σ = 96889010412. Its totient is φ = 64592673600.

The previous prime is 80740841999. The next prime is 80740842023. The reversal of 80740842005 is 50024804708.

80740842005 is nontrivially palindromic in base 7.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10236785329 + 70504056676 = 101177^2 + 265526^2 .

It is not a de Polignac number, because 80740842005 - 2¹² = 80740837909 is a prime.

It is a Duffinian number.

80740842005 is a nontrivial repdigit in base 7.

It is a plaindrome in base 7.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 80740842005.

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, 8074084196 + ... + 8074084205.

It is an arithmetic number, because the mean of its divisors is an integer number (24222252603).

Almost surely, 2^80740842005 is an apocalyptic number.

It is an amenable number.

80740842005 is a deficient number, since it is larger than the sum of its proper divisors (16148168407).

80740842005 is a wasteful number, since it uses less digits than its factorization.

80740842005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16148168406.

The product of its (nonzero) digits is 71680, while the sum is 38.

The spelling of 80740842005 in words is "eighty billion, seven hundred forty million, eight hundred forty-two thousand, five".