2168455686 has 64 divisors (see below), whose sum is σ = 4790776320. Its totient is φ = 651974400.

The previous prime is 2168455637. The next prime is 2168455699. The reversal of 2168455686 is 6865548612.

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, 165786 + ... + 178386.

It is an arithmetic number, because the mean of its divisors is an integer number (74855880).

Almost surely, 2^2168455686 is an apocalyptic number.

2168455686 is an abundant number, since it is smaller than the sum of its proper divisors (2622320634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2168455686 is a wasteful number, since it uses less digits than its factorization.

2168455686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12701.

The product of its digits is 2764800, while the sum is 51.

The square root of 2168455686 is about 46566.6799976120. The cubic root of 2168455686 is about 1294.3453976619.

The spelling of 2168455686 in words is "two billion, one hundred sixty-eight million, four hundred fifty-five thousand, six hundred eighty-six".