2685390514661 has 16 divisors (see below), whose sum is σ = 2700065507328. Its totient is φ = 2670755068800.

The previous prime is 2685390514649. The next prime is 2685390514771. The reversal of 2685390514661 is 1664150935862.

It is a cyclic number.

It is not a de Polignac number, because 2685390514661 - 2¹⁴ = 2685390498277 is a prime.

It is a super-2 number, since 2×2685390514661² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2685390514597 and 2685390514606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685390514561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 490838156 + ... + 490843626.

It is an arithmetic number, because the mean of its divisors is an integer number (168754094208).

Almost surely, 2^{2685390514661} is an apocalyptic number.

It is an amenable number.

2685390514661 is a deficient number, since it is larger than the sum of its proper divisors (14674992667).

2685390514661 is a wasteful number, since it uses less digits than its factorization.

2685390514661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8612.

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 2685390514661 in words is "two trillion, six hundred eighty-five billion, three hundred ninety million, five hundred fourteen thousand, six hundred sixty-one".