80440684644 has 12 divisors (see below), whose sum is σ = 187694930864. Its totient is φ = 26813561544.

The previous prime is 80440684631. The next prime is 80440684699. The reversal of 80440684644 is 44648604408.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 80440684593 and 80440684602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351695182 + ... + 3351695205.

Almost surely, 2^80440684644 is an apocalyptic number.

It is an amenable number.

80440684644 is an abundant number, since it is smaller than the sum of its proper divisors (107254246220).

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

80440684644 is a wasteful number, since it uses less digits than its factorization.

80440684644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703390394 (or 6703390392 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 48.

The spelling of 80440684644 in words is "eighty billion, four hundred forty million, six hundred eighty-four thousand, six hundred forty-four".