671893204711 has 4 divisors (see below), whose sum is σ = 690052480552. Its totient is φ = 653733928872.

The previous prime is 671893204709. The next prime is 671893204733. The reversal of 671893204711 is 117402398176.

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

It is a cyclic number.

It is not a de Polignac number, because 671893204711 - 2¹ = 671893204709 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 (671893204751) 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, 9079637865 + ... + 9079637938.

It is an arithmetic number, because the mean of its divisors is an integer number (172513120138).

Almost surely, 2^671893204711 is an apocalyptic number.

671893204711 is a deficient number, since it is larger than the sum of its proper divisors (18159275841).

671893204711 is a wasteful number, since it uses less digits than its factorization.

671893204711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18159275840.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 671893204711 in words is "six hundred seventy-one billion, eight hundred ninety-three million, two hundred four thousand, seven hundred eleven".