5721023545 has 4 divisors (see below), whose sum is σ = 6865228260. Its totient is φ = 4576818832.

The previous prime is 5721023533. The next prime is 5721023579. The reversal of 5721023545 is 5453201275.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3243074704 + 2477948841 = 56948^2 + 49779^2 .

It is a cyclic number.

It is not a de Polignac number, because 5721023545 - 2⁷ = 5721023417 is a prime.

It is a super-2 number, since 2×5721023545² = 65460220804888734050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5721023545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572102350 + ... + 572102359.

It is an arithmetic number, because the mean of its divisors is an integer number (1716307065).

Almost surely, 2^5721023545 is an apocalyptic number.

It is an amenable number.

5721023545 is a deficient number, since it is larger than the sum of its proper divisors (1144204715).

5721023545 is a wasteful number, since it uses less digits than its factorization.

5721023545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144204714.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 5721023545 is about 75637.4480333651. The cubic root of 5721023545 is about 1788.5094741069.

The spelling of 5721023545 in words is "five billion, seven hundred twenty-one million, twenty-three thousand, five hundred forty-five".