202102853688889 has 2 divisors, whose sum is σ = 202102853688890. Its totient is φ = 202102853688888.

The previous prime is 202102853688823. The next prime is 202102853688899. The reversal of 202102853688889 is 988886358201202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127031112972864 + 75071740716025 = 11270808^2 + 8664395^2 .

It is a cyclic number.

It is not a de Polignac number, because 202102853688889 - 2²¹ = 202102851591737 is a prime.

It is not a weakly prime, because it can be changed into another prime (202102853688899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051426844444 + 101051426844445.

It is an arithmetic number, because the mean of its divisors is an integer number (101051426844445).

Almost surely, 2^{202102853688889} is an apocalyptic number.

It is an amenable number.

202102853688889 is a deficient number, since it is larger than the sum of its proper divisors (1).

202102853688889 is an equidigital number, since it uses as much as digits as its factorization.

202102853688889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 212336640, while the sum is 70.

The spelling of 202102853688889 in words is "two hundred two trillion, one hundred two billion, eight hundred fifty-three million, six hundred eighty-eight thousand, eight hundred eighty-nine".