646597304563579 has 16 divisors (see below), whose sum is σ = 674783417160000. Its totient is φ = 618417295220736.

The previous prime is 646597304563417. The next prime is 646597304563589. The reversal of 646597304563579 is 975365403795646.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646597304563579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646597304563499 and 646597304563508.

It is not an unprimeable number, because it can be changed into a prime (646597304563589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12791470197 + ... + 12791520745.

It is an arithmetic number, because the mean of its divisors is an integer number (42173963572500).

Almost surely, 2^{646597304563579} is an apocalyptic number.

646597304563579 is a deficient number, since it is larger than the sum of its proper divisors (28186112596421).

646597304563579 is a wasteful number, since it uses less digits than its factorization.

646597304563579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99894.

The product of its (nonzero) digits is 15431472000, while the sum is 79.

The spelling of 646597304563579 in words is "six hundred forty-six trillion, five hundred ninety-seven billion, three hundred four million, five hundred sixty-three thousand, five hundred seventy-nine".