646601106646 has 8 divisors (see below), whose sum is σ = 1058074538184. Its totient is φ = 293909593920.

The previous prime is 646601106637. The next prime is 646601106649.

646601106646 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 2×646601106646² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646601106596 and 646601106605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646601106649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14695479675 + ... + 14695479718.

It is an arithmetic number, because the mean of its divisors is an integer number (132259317273).

Almost surely, 2^646601106646 is an apocalyptic number.

646601106646 is a deficient number, since it is larger than the sum of its proper divisors (411473431538).

646601106646 is a wasteful number, since it uses less digits than its factorization.

646601106646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29390959406.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 646601106646 in words is "six hundred forty-six billion, six hundred one million, one hundred six thousand, six hundred forty-six".