671241443840 has 80 divisors (see below), whose sum is σ = 1755715975200. Its totient is φ = 244087787520.

The previous prime is 671241443833. The next prime is 671241443861. The reversal of 671241443840 is 48344142176.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 671241443791 and 671241443800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11890190 + ... + 11946509.

It is an arithmetic number, because the mean of its divisors is an integer number (21946449690).

Almost surely, 2^671241443840 is an apocalyptic number.

It is an amenable number.

671241443840 is an abundant number, since it is smaller than the sum of its proper divisors (1084474531360).

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

671241443840 is a wasteful number, since it uses less digits than its factorization.

671241443840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23836733 (or 23836717 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 44.

The spelling of 671241443840 in words is "six hundred seventy-one billion, two hundred forty-one million, four hundred forty-three thousand, eight hundred forty".