671177649647 has 8 divisors (see below), whose sum is σ = 677161605120. Its totient is φ = 665213945400.

The previous prime is 671177649631. The next prime is 671177649671. The reversal of 671177649647 is 746946771176.

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 671177649647 - 2⁴ = 671177649631 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 (671177649617) 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, 4996223 + ... + 5128800.

It is an arithmetic number, because the mean of its divisors is an integer number (84645200640).

Almost surely, 2^671177649647 is an apocalyptic number.

671177649647 is a deficient number, since it is larger than the sum of its proper divisors (5983955473).

671177649647 is a wasteful number, since it uses less digits than its factorization.

671177649647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10125613.

The product of its digits is 74680704, while the sum is 65.

The spelling of 671177649647 in words is "six hundred seventy-one billion, one hundred seventy-seven million, six hundred forty-nine thousand, six hundred forty-seven".