646450356313 has 32 divisors (see below), whose sum is σ = 700953269760. Its totient is φ = 594345185280.

The previous prime is 646450356271. The next prime is 646450356341. The reversal of 646450356313 is 313653054646.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646450356313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646450356913) 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 31 ways as a sum of consecutive naturals, for example, 152786908 + ... + 152791138.

It is an arithmetic number, because the mean of its divisors is an integer number (21904789680).

Almost surely, 2^646450356313 is an apocalyptic number.

It is an amenable number.

646450356313 is a deficient number, since it is larger than the sum of its proper divisors (54502913447).

646450356313 is a wasteful number, since it uses less digits than its factorization.

646450356313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5257.

The product of its (nonzero) digits is 2332800, while the sum is 46.

The spelling of 646450356313 in words is "six hundred forty-six billion, four hundred fifty million, three hundred fifty-six thousand, three hundred thirteen".