2685498689849 has 2 divisors, whose sum is σ = 2685498689850. Its totient is φ = 2685498689848.

The previous prime is 2685498689821. The next prime is 2685498689851. The reversal of 2685498689849 is 9489868945862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2619072906025 + 66425783824 = 1618355^2 + 257732^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685498689849 - 2¹⁶ = 2685498624313 is a prime.

Together with 2685498689851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2685498683849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342749344924 + 1342749344925.

It is an arithmetic number, because the mean of its divisors is an integer number (1342749344925).

Almost surely, 2^{2685498689849} is an apocalyptic number.

It is an amenable number.

2685498689849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685498689849 is an equidigital number, since it uses as much as digits as its factorization.

2685498689849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17199267840, while the sum is 86.

The spelling of 2685498689849 in words is "two trillion, six hundred eighty-five billion, four hundred ninety-eight million, six hundred eighty-nine thousand, eight hundred forty-nine".