5164867721 has 8 divisors (see below), whose sum is σ = 5572158984. Its totient is φ = 4759004160.

The previous prime is 5164867711. The next prime is 5164867739. The reversal of 5164867721 is 1277684615.

It can be written as a sum of positive squares in 4 ways, for example, as 143161225 + 5021706496 = 11965^2 + 70864^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5164867721 is a prime.

It is a super-3 number, since 3×5164867721³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5164867711) 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, 349400 + ... + 363881.

It is an arithmetic number, because the mean of its divisors is an integer number (696519873).

Almost surely, 2^5164867721 is an apocalyptic number.

It is an amenable number.

5164867721 is a deficient number, since it is larger than the sum of its proper divisors (407291263).

5164867721 is a wasteful number, since it uses less digits than its factorization.

5164867721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713851.

The product of its digits is 564480, while the sum is 47.

The square root of 5164867721 is about 71867.0141372243. The cubic root of 5164867721 is about 1728.5677299816.

The spelling of 5164867721 in words is "five billion, one hundred sixty-four million, eight hundred sixty-seven thousand, seven hundred twenty-one".