80408440400 has 30 divisors (see below), whose sum is σ = 193181279022. Its totient is φ = 32163376000.

The previous prime is 80408440397. The next prime is 80408440423. The reversal of 80408440400 is 404480408.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 12804280336 + 67604160064 = 113156^2 + 260008^2 .

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 100510151 + ... + 100510950.

Almost surely, 2^80408440400 is an apocalyptic number.

80408440400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80408440400 is an abundant number, since it is smaller than the sum of its proper divisors (112772838622).

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

80408440400 is a wasteful number, since it uses less digits than its factorization.

80408440400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201021119 (or 201021108 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The spelling of 80408440400 in words is "eighty billion, four hundred eight million, four hundred forty thousand, four hundred".