80421540444 has 60 divisors (see below), whose sum is σ = 240271769584. Its totient is φ = 22977582336.

The previous prime is 80421540413. The next prime is 80421540461. The reversal of 80421540444 is 44404512408.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 80421540399 and 80421540408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17727349 + ... + 17731884.

Almost surely, 2^80421540444 is an apocalyptic number.

80421540444 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

80421540444 is an abundant number, since it is smaller than the sum of its proper divisors (159850229140).

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

80421540444 is a wasteful number, since it uses less digits than its factorization.

80421540444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35459256 (or 35459245 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 36.

The spelling of 80421540444 in words is "eighty billion, four hundred twenty-one million, five hundred forty thousand, four hundred forty-four".