646763367646 has 8 divisors (see below), whose sum is σ = 1058340056184. Its totient is φ = 293983348920.

The previous prime is 646763367631. The next prime is 646763367709.

646763367646 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14699167425 + ... + 14699167468.

It is an arithmetic number, because the mean of its divisors is an integer number (132292507023).

Almost surely, 2^646763367646 is an apocalyptic number.

646763367646 is a deficient number, since it is larger than the sum of its proper divisors (411576688538).

646763367646 is a wasteful number, since it uses less digits than its factorization.

646763367646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29398334906.

The product of its digits is 329204736, while the sum is 64.

The spelling of 646763367646 in words is "six hundred forty-six billion, seven hundred sixty-three million, three hundred sixty-seven thousand, six hundred forty-six".