646601808297 has 16 divisors (see below), whose sum is σ = 877292153280. Its totient is φ = 423498733632.

The previous prime is 646601808283. The next prime is 646601808401. The reversal of 646601808297 is 792808106646.

It is not a de Polignac number, because 646601808297 - 2³⁹ = 96845994409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646601808247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 846898 + ... + 1417899.

It is an arithmetic number, because the mean of its divisors is an integer number (54830759580).

Almost surely, 2^646601808297 is an apocalyptic number.

It is an amenable number.

646601808297 is a deficient number, since it is larger than the sum of its proper divisors (230690344983).

646601808297 is a wasteful number, since it uses less digits than its factorization.

646601808297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266472.

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 646601808297 in words is "six hundred forty-six billion, six hundred one million, eight hundred eight thousand, two hundred ninety-seven".