4219671681 has 27 divisors (see below), whose sum is σ = 6217078881. Its totient is φ = 2757899304.

The previous prime is 4219671679. The next prime is 4219671721. The reversal of 4219671681 is 1861769124.

The square root of 4219671681 is 64959.

It is a perfect power (a square), and thus also a powerful number.

4219671681 is a `hidden beast` number, since 421 + 9 + 67 + 168 + 1 = 666.

It is not a de Polignac number, because 4219671681 - 2¹ = 4219671679 is a prime.

It is a super-2 number, since 2×4219671681² = 35611258190866731522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4219691681) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11497560 + ... + 11497926.

Almost surely, 2^4219671681 is an apocalyptic number.

4219671681 is the 64959-th square number.

4219671681 is the 32480-th centered octagonal number.

It is an amenable number.

4219671681 is a deficient number, since it is larger than the sum of its proper divisors (1997407200).

4219671681 is an frugal number, since it uses more digits than its factorization.

4219671681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 429 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The cubic root of 4219671681 is about 1615.9436801568.

The spelling of 4219671681 in words is "four billion, two hundred nineteen million, six hundred seventy-one thousand, six hundred eighty-one".