2116445062565 has 4 divisors (see below), whose sum is σ = 2539734075084. Its totient is φ = 1693156050048.

The previous prime is 2116445062513. The next prime is 2116445062609. The reversal of 2116445062565 is 5652605446112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1361296228516 + 755148834049 = 1166746^2 + 868993^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116445062565 - 2²² = 2116440868261 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 211644506252 + ... + 211644506261.

It is an arithmetic number, because the mean of its divisors is an integer number (634933518771).

Almost surely, 2^{2116445062565} is an apocalyptic number.

It is an amenable number.

2116445062565 is a deficient number, since it is larger than the sum of its proper divisors (423289012519).

2116445062565 is an equidigital number, since it uses as much as digits as its factorization.

2116445062565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423289012518.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 2116445062565 in words is "two trillion, one hundred sixteen billion, four hundred forty-five million, sixty-two thousand, five hundred sixty-five".