646258852646 has 16 divisors (see below), whose sum is σ = 1062173148480. Its totient is φ = 292459951080.

The previous prime is 646258852571. The next prime is 646258852661.

It is a happy number.

646258852646 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 64698536 + ... + 64708523.

It is an arithmetic number, because the mean of its divisors is an integer number (66385821780).

Almost surely, 2^646258852646 is an apocalyptic number.

646258852646 is a deficient number, since it is larger than the sum of its proper divisors (415914295834).

646258852646 is a wasteful number, since it uses less digits than its factorization.

646258852646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129407299.

The product of its digits is 132710400, while the sum is 62.

The spelling of 646258852646 in words is "six hundred forty-six billion, two hundred fifty-eight million, eight hundred fifty-two thousand, six hundred forty-six".