4064031721 has 8 divisors (see below), whose sum is σ = 4082246280. Its totient is φ = 4045836288.

The previous prime is 4064031703. The next prime is 4064031761. The reversal of 4064031721 is 1271304604.

It can be written as a sum of positive squares in 4 ways, for example, as 2110391721 + 1953640000 = 45939^2 + 44200^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4064031721 - 2⁵ = 4064031689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4064031721.

It is not an unprimeable number, because it can be changed into a prime (4064031761) 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, 571375 + ... + 578443.

It is an arithmetic number, because the mean of its divisors is an integer number (510280785).

Almost surely, 2^4064031721 is an apocalyptic number.

It is an amenable number.

4064031721 is a deficient number, since it is larger than the sum of its proper divisors (18214559).

4064031721 is a wasteful number, since it uses less digits than its factorization.

4064031721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9563.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 4064031721 is about 63749.7585956214. The cubic root of 4064031721 is about 1595.8265872781.

It can be divided in two parts, 40640 and 31721, that added together give a square (72361 = 269²).

The spelling of 4064031721 in words is "four billion, sixty-four million, thirty-one thousand, seven hundred twenty-one".