2168455685 has 32 divisors (see below), whose sum is σ = 2907781632. Its totient is φ = 1538887680.

The previous prime is 2168455637. The next prime is 2168455699. The reversal of 2168455685 is 5865548612.

It is not a de Polignac number, because 2168455685 - 2¹⁸ = 2168193541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1025189 + ... + 1027301.

It is an arithmetic number, because the mean of its divisors is an integer number (90868176).

Almost surely, 2^2168455685 is an apocalyptic number.

It is an amenable number.

2168455685 is a deficient number, since it is larger than the sum of its proper divisors (739325947).

2168455685 is a wasteful number, since it uses less digits than its factorization.

2168455685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573.

The product of its digits is 2304000, while the sum is 50.

The square root of 2168455685 is about 46566.6799868747. The cubic root of 2168455685 is about 1294.3453974629.

The spelling of 2168455685 in words is "two billion, one hundred sixty-eight million, four hundred fifty-five thousand, six hundred eighty-five".