4065486921 has 12 divisors (see below), whose sum is σ = 5872984260. Its totient is φ = 2710041120.

The previous prime is 4065486917. The next prime is 4065486973. The reversal of 4065486921 is 1296845604.

4065486921 is a `hidden beast` number, since 40 + 6 + 548 + 69 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 714813696 + 3350673225 = 26736^2 + 57885^2 .

It is not a de Polignac number, because 4065486921 - 2² = 4065486917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4065486421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102811 + ... + 136751.

It is an arithmetic number, because the mean of its divisors is an integer number (489415355).

Almost surely, 2^4065486921 is an apocalyptic number.

It is an amenable number.

4065486921 is a deficient number, since it is larger than the sum of its proper divisors (1807497339).

4065486921 is a wasteful number, since it uses less digits than its factorization.

4065486921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47256 (or 47253 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 4065486921 is about 63761.1709506656. The cubic root of 4065486921 is about 1596.0170360648.

The spelling of 4065486921 in words is "four billion, sixty-five million, four hundred eighty-six thousand, nine hundred twenty-one".