2168210990593 has 4 divisors (see below), whose sum is σ = 2168252897328. Its totient is φ = 2168169083860.

The previous prime is 2168210990551. The next prime is 2168210990663. The reversal of 2168210990593 is 3950990128612.

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 2168210990593 - 2²¹ = 2168208893441 is a prime.

It is a super-2 number, since 2×2168210990593² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2168210990513) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20875663 + ... + 20979268.

It is an arithmetic number, because the mean of its divisors is an integer number (542063224332).

Almost surely, 2^{2168210990593} is an apocalyptic number.

It is an amenable number.

2168210990593 is a deficient number, since it is larger than the sum of its proper divisors (41906735).

2168210990593 is an equidigital number, since it uses as much as digits as its factorization.

2168210990593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41906734.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The spelling of 2168210990593 in words is "two trillion, one hundred sixty-eight billion, two hundred ten million, nine hundred ninety thousand, five hundred ninety-three".