647777314321 has 8 divisors (see below), whose sum is σ = 682699392320. Its totient is φ = 612938089872.

The previous prime is 647777314313. The next prime is 647777314391. The reversal of 647777314321 is 123413777746.

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 647777314321 - 2³ = 647777314313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647777314391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20697330 + ... + 20728603.

It is an arithmetic number, because the mean of its divisors is an integer number (85337424040).

Almost surely, 2^647777314321 is an apocalyptic number.

It is an amenable number.

647777314321 is a deficient number, since it is larger than the sum of its proper divisors (34922077999).

647777314321 is a wasteful number, since it uses less digits than its factorization.

647777314321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41426775.

The product of its digits is 4148928, while the sum is 52.

The spelling of 647777314321 in words is "six hundred forty-seven billion, seven hundred seventy-seven million, three hundred fourteen thousand, three hundred twenty-one".