2172127668 has 24 divisors (see below), whose sum is σ = 5082118272. Its totient is φ = 722068224.

The previous prime is 2172127667. The next prime is 2172127669. The reversal of 2172127668 is 8667212712.

It is an interprime number because it is at equal distance from previous prime (2172127667) and next prime (2172127669).

It is a super-2 number, since 2×2172127668² = 9436277212182236448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172127667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242205 + ... + 251012.

It is an arithmetic number, because the mean of its divisors is an integer number (211754928).

Almost surely, 2^2172127668 is an apocalyptic number.

It is an amenable number.

2172127668 is an abundant number, since it is smaller than the sum of its proper divisors (2909990604).

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

2172127668 is a wasteful number, since it uses less digits than its factorization.

2172127668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493591 (or 493589 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 2172127668 is about 46606.0904603679. The cubic root of 2172127668 is about 1295.0755844038.

The spelling of 2172127668 in words is "two billion, one hundred seventy-two million, one hundred twenty-seven thousand, six hundred sixty-eight".