2116545220717 has 4 divisors (see below), whose sum is σ = 2124592921440. Its totient is φ = 2108497519996.

The previous prime is 2116545220687. The next prime is 2116545220723. The reversal of 2116545220717 is 7170225456112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2116545220717 - 2³⁹ = 1566789406829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116545229717) by changing a digit.

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, 4023849967 + ... + 4023850492.

It is an arithmetic number, because the mean of its divisors is an integer number (531148230360).

Almost surely, 2^{2116545220717} is an apocalyptic number.

It is an amenable number.

2116545220717 is a deficient number, since it is larger than the sum of its proper divisors (8047700723).

2116545220717 is an equidigital number, since it uses as much as digits as its factorization.

2116545220717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8047700722.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 2116545220717 in words is "two trillion, one hundred sixteen billion, five hundred forty-five million, two hundred twenty thousand, seven hundred seventeen".