671553175813 has 8 divisors (see below), whose sum is σ = 765752942808. Its totient is φ = 583430813184.

The previous prime is 671553175781. The next prime is 671553175879. The reversal of 671553175813 is 318571355176.

It can be written as a sum of positive squares in 4 ways, for example, as 117269947809 + 554283228004 = 342447^2 + 744502^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 671553175813 - 2⁵ = 671553175781 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 (671553175883) 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, 1519350856 + ... + 1519351297.

It is an arithmetic number, because the mean of its divisors is an integer number (95719117851).

Almost surely, 2^671553175813 is an apocalyptic number.

It is an amenable number.

671553175813 is a deficient number, since it is larger than the sum of its proper divisors (94199766995).

671553175813 is a wasteful number, since it uses less digits than its factorization.

671553175813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038702183.

The product of its digits is 2646000, while the sum is 52.

The spelling of 671553175813 in words is "six hundred seventy-one billion, five hundred fifty-three million, one hundred seventy-five thousand, eight hundred thirteen".