646404642462 has 16 divisors (see below), whose sum is σ = 1292829702912. Its totient is φ = 215464811160.

The previous prime is 646404642379. The next prime is 646404642577. The reversal of 646404642462 is 264246404646.

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, 422614 + ... + 1213017.

It is an arithmetic number, because the mean of its divisors is an integer number (80801856432).

Almost surely, 2^646404642462 is an apocalyptic number.

646404642462 is an abundant number, since it is smaller than the sum of its proper divisors (646425060450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646404642462 is a wasteful number, since it uses less digits than its factorization.

646404642462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701503.

The product of its (nonzero) digits is 5308416, while the sum is 48.

The spelling of 646404642462 in words is "six hundred forty-six billion, four hundred four million, six hundred forty-two thousand, four hundred sixty-two".