16564642210450 has 12 divisors (see below), whose sum is σ = 30810234511530. Its totient is φ = 6625856884160.

The previous prime is 16564642210433. The next prime is 16564642210469. The reversal of 16564642210450 is 5401224646561.

It can be written as a sum of positive squares in 3 ways, for example, as 12426351160609 + 4138291049841 = 3525103^2 + 2034279^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16564642210450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165646422055 + ... + 165646422154.

Almost surely, 2^{16564642210450} is an apocalyptic number.

16564642210450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16564642210450 is a deficient number, since it is larger than the sum of its proper divisors (14245592301080).

16564642210450 is a wasteful number, since it uses less digits than its factorization.

16564642210450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331292844221 (or 331292844216 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 16564642210450 in words is "sixteen trillion, five hundred sixty-four billion, six hundred forty-two million, two hundred ten thousand, four hundred fifty".