646932848239646 has 8 divisors (see below), whose sum is σ = 983692413076944. Its totient is φ = 319035377214000.

The previous prime is 646932848239609. The next prime is 646932848239663.

646932848239646 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×646932848239646² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215523452730 + ... + 2215523453021.

It is an arithmetic number, because the mean of its divisors is an integer number (122961551634618).

Almost surely, 2^{646932848239646} is an apocalyptic number.

646932848239646 is a deficient number, since it is larger than the sum of its proper divisors (336759564837298).

646932848239646 is a wasteful number, since it uses less digits than its factorization.

646932848239646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431046905826.

The product of its digits is 15479341056, while the sum is 80.

The spelling of 646932848239646 in words is "six hundred forty-six trillion, nine hundred thirty-two billion, eight hundred forty-eight million, two hundred thirty-nine thousand, six hundred forty-six".