2685550809577 has 2 divisors, whose sum is σ = 2685550809578. Its totient is φ = 2685550809576.

The previous prime is 2685550809553. The next prime is 2685550809631. The reversal of 2685550809577 is 7759080555862.

2685550809577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2290709493081 + 394841316496 = 1513509^2 + 628364^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685550809577 - 2¹⁹ = 2685550285289 is a prime.

It is a super-2 number, since 2×2685550809577² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2685550800577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342775404788 + 1342775404789.

It is an arithmetic number, because the mean of its divisors is an integer number (1342775404789).

Almost surely, 2^{2685550809577} is an apocalyptic number.

It is an amenable number.

2685550809577 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685550809577 is an equidigital number, since it uses as much as digits as its factorization.

2685550809577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680000, while the sum is 67.

The spelling of 2685550809577 in words is "two trillion, six hundred eighty-five billion, five hundred fifty million, eight hundred nine thousand, five hundred seventy-seven".