671577840443 has 8 divisors (see below), whose sum is σ = 724941597600. Its totient is φ = 620227810048.

The previous prime is 671577840431. The next prime is 671577840463. The reversal of 671577840443 is 344048775176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671577840443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671577840463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503430998 + ... + 503432331.

It is an arithmetic number, because the mean of its divisors is an integer number (90617699700).

Almost surely, 2^671577840443 is an apocalyptic number.

671577840443 is a deficient number, since it is larger than the sum of its proper divisors (53363757157).

671577840443 is a wasteful number, since it uses less digits than its factorization.

671577840443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006863381.

The product of its (nonzero) digits is 15805440, while the sum is 56.

The spelling of 671577840443 in words is "six hundred seventy-one billion, five hundred seventy-seven million, eight hundred forty thousand, four hundred forty-three".