853505102861 has 2 divisors, whose sum is σ = 853505102862. Its totient is φ = 853505102860.

The previous prime is 853505102803. The next prime is 853505102869. The reversal of 853505102861 is 168201505358.

853505102861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 469644313636 + 383860789225 = 685306^2 + 619565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-853505102861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853505102869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426752551430 + 426752551431.

It is an arithmetic number, because the mean of its divisors is an integer number (426752551431).

Almost surely, 2^853505102861 is an apocalyptic number.

It is an amenable number.

853505102861 is a deficient number, since it is larger than the sum of its proper divisors (1).

853505102861 is an equidigital number, since it uses as much as digits as its factorization.

853505102861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 853505102861 in words is "eight hundred fifty-three billion, five hundred five million, one hundred two thousand, eight hundred sixty-one".