5721560881 has 3 divisors (see below), whose sum is σ = 5721636523. Its totient is φ = 5721485240.

The previous prime is 5721560869. The next prime is 5721560893. The reversal of 5721560881 is 1880651275.

The square root of 5721560881 is 75641.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (5721560869) and next prime (5721560893).

It can be written as a sum of positive squares in only one way, i.e., 5716720881 + 4840000 = 75609^2 + 2200^2 .

It is not a de Polignac number, because 5721560881 - 2¹¹ = 5721558833 is a prime.

It is a super-2 number, since 2×5721560881² = 65472517829978992322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5721560821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 37821 + ... + 113461.

Almost surely, 2^5721560881 is an apocalyptic number.

5721560881 is the 75641-st square number.

5721560881 is the 37821-st centered octagonal number.

It is an amenable number.

5721560881 is a deficient number, since it is larger than the sum of its proper divisors (75642).

5721560881 is an frugal number, since it uses more digits than its factorization.

5721560881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151282 (or 75641 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 43.

The cubic root of 5721560881 is about 1788.5654664442.

The spelling of 5721560881 in words is "five billion, seven hundred twenty-one million, five hundred sixty thousand, eight hundred eighty-one".