80404440040 has 32 divisors (see below), whose sum is σ = 181031296680. Its totient is φ = 32140210432.

The previous prime is 80404439939. The next prime is 80404440097. The reversal of 80404440040 is 4004440408.

It can be written as a sum of positive squares in 4 ways, for example, as 80305357924 + 99082116 = 283382^2 + 9954^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80404439990 and 80404440008.

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 in 7 ways as a sum of consecutive naturals, for example, 613459 + ... + 732898.

Almost surely, 2^80404440040 is an apocalyptic number.

It is an amenable number.

80404440040 is an abundant number, since it is smaller than the sum of its proper divisors (100626856640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80404440040 is a wasteful number, since it uses less digits than its factorization.

80404440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347861 (or 1347857 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 80404440040 its reverse (4004440408), we get a palindrome (84408880448).

The spelling of 80404440040 in words is "eighty billion, four hundred four million, four hundred forty thousand, forty".