674721738647 has 8 divisors (see below), whose sum is σ = 739302636672. Its totient is φ = 610681267000.

The previous prime is 674721738539. The next prime is 674721738673. The reversal of 674721738647 is 746837127476.

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 674721738647 - 2¹⁸ = 674721476503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 674721738647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674721735647) 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, 135103979 + ... + 135108972.

It is an arithmetic number, because the mean of its divisors is an integer number (92412829584).

Almost surely, 2^674721738647 is an apocalyptic number.

674721738647 is a deficient number, since it is larger than the sum of its proper divisors (64580898025).

674721738647 is a wasteful number, since it uses less digits than its factorization.

674721738647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270213189.

The product of its digits is 66382848, while the sum is 62.

The spelling of 674721738647 in words is "six hundred seventy-four billion, seven hundred twenty-one million, seven hundred thirty-eight thousand, six hundred forty-seven".