1016564044645 has 8 divisors (see below), whose sum is σ = 1219917917304. Its totient is φ = 813223859904.

The previous prime is 1016564044619. The next prime is 1016564044667. The reversal of 1016564044645 is 5464404656101.

It can be written as a sum of positive squares in 4 ways, for example, as 1630705924 + 1014933338721 = 40382^2 + 1007439^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1016564044645 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1016564044595 and 1016564044604.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3257874 + ... + 3556243.

It is an arithmetic number, because the mean of its divisors is an integer number (152489739663).

Almost surely, 2^{1016564044645} is an apocalyptic number.

It is an amenable number.

1016564044645 is a deficient number, since it is larger than the sum of its proper divisors (203353872659).

1016564044645 is an equidigital number, since it uses as much as digits as its factorization.

1016564044645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6843959.

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

The spelling of 1016564044645 in words is "one trillion, sixteen billion, five hundred sixty-four million, forty-four thousand, six hundred forty-five".