671508447613 has 4 divisors (see below), whose sum is σ = 685795861440. Its totient is φ = 657221033788.

The previous prime is 671508447611. The next prime is 671508447641. The reversal of 671508447613 is 316744805176.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671508447613 - 2¹ = 671508447611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671508447611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7143706843 + ... + 7143706936.

It is an arithmetic number, because the mean of its divisors is an integer number (171448965360).

Almost surely, 2^671508447613 is an apocalyptic number.

It is an amenable number.

671508447613 is a deficient number, since it is larger than the sum of its proper divisors (14287413827).

671508447613 is a wasteful number, since it uses less digits than its factorization.

671508447613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14287413826.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 671508447613 in words is "six hundred seventy-one billion, five hundred eight million, four hundred forty-seven thousand, six hundred thirteen".