671342670109 has 4 divisors (see below), whose sum is σ = 680539145116. Its totient is φ = 662146195104.

The previous prime is 671342670107. The next prime is 671342670113. The reversal of 671342670109 is 901076243176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 335678866884 + 335663803225 = 579378^2 + 579365^2 .

It is a cyclic number.

It is not a de Polignac number, because 671342670109 - 2¹ = 671342670107 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 (671342670107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4598237394 + ... + 4598237539.

It is an arithmetic number, because the mean of its divisors is an integer number (170134786279).

Almost surely, 2^671342670109 is an apocalyptic number.

It is an amenable number.

671342670109 is a deficient number, since it is larger than the sum of its proper divisors (9196475007).

671342670109 is an equidigital number, since it uses as much as digits as its factorization.

671342670109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9196475006.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 671342670109 in words is "six hundred seventy-one billion, three hundred forty-two million, six hundred seventy thousand, one hundred nine".