671553204445 has 16 divisors (see below), whose sum is σ = 843254802432. Its totient is φ = 512790065280.

The previous prime is 671553204437. The next prime is 671553204451. The reversal of 671553204445 is 544402355176.

It is not a de Polignac number, because 671553204445 - 2³ = 671553204437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 671553204395 and 671553204404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29664037 + ... + 29686666.

It is an arithmetic number, because the mean of its divisors is an integer number (52703425152).

Almost surely, 2^671553204445 is an apocalyptic number.

It is an amenable number.

671553204445 is a deficient number, since it is larger than the sum of its proper divisors (171701597987).

671553204445 is a wasteful number, since it uses less digits than its factorization.

671553204445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59350812.

The product of its (nonzero) digits is 2016000, while the sum is 46.

The spelling of 671553204445 in words is "six hundred seventy-one billion, five hundred fifty-three million, two hundred four thousand, four hundred forty-five".