2685158549 has 2 divisors, whose sum is σ = 2685158550. Its totient is φ = 2685158548.

The previous prime is 2685158543. The next prime is 2685158563. The reversal of 2685158549 is 9458515862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2681375524 + 3783025 = 51782^2 + 1945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2685158549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2685158549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2685158543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342579274 + 1342579275.

It is an arithmetic number, because the mean of its divisors is an integer number (1342579275).

Almost surely, 2^2685158549 is an apocalyptic number.

It is an amenable number.

2685158549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685158549 is an equidigital number, since it uses as much as digits as its factorization.

2685158549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456000, while the sum is 53.

The square root of 2685158549 is about 51818.5155036306. The cubic root of 2685158549 is about 1389.9205566797.

The spelling of 2685158549 in words is "two billion, six hundred eighty-five million, one hundred fifty-eight thousand, five hundred forty-nine".