671711913849 has 8 divisors (see below), whose sum is σ = 895699450912. Its totient is φ = 447766159680.

The previous prime is 671711913841. The next prime is 671711913863. The reversal of 671711913849 is 948319117176.

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

It is not a de Polignac number, because 671711913849 - 2³ = 671711913841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671711913841) 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, 10408192 + ... + 10472529.

It is an arithmetic number, because the mean of its divisors is an integer number (111962431364).

Almost surely, 2^671711913849 is an apocalyptic number.

It is an amenable number.

671711913849 is a deficient number, since it is larger than the sum of its proper divisors (223987537063).

671711913849 is a wasteful number, since it uses less digits than its factorization.

671711913849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20891447.

The product of its digits is 2286144, while the sum is 57.

The spelling of 671711913849 in words is "six hundred seventy-one billion, seven hundred eleven million, nine hundred thirteen thousand, eight hundred forty-nine".