646111055504416 has 24 divisors (see below), whose sum is σ = 1272031932596544. Its totient is φ = 323055326591040.

The previous prime is 646111055504407. The next prime is 646111055504539. The reversal of 646111055504416 is 614405550111646.

It is a self number, because there is not a number n which added to its sum of digits gives 646111055504416.

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, 55142061 + ... + 65824531.

It is an arithmetic number, because the mean of its divisors is an integer number (53001330524856).

Almost surely, 2^{646111055504416} is an apocalyptic number.

It is an amenable number.

646111055504416 is a deficient number, since it is larger than the sum of its proper divisors (625920877092128).

646111055504416 is a wasteful number, since it uses less digits than its factorization.

646111055504416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12572584 (or 12572576 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 49.

The spelling of 646111055504416 in words is "six hundred forty-six trillion, one hundred eleven billion, fifty-five million, five hundred four thousand, four hundred sixteen".