5721606545 has 4 divisors (see below), whose sum is σ = 6865927860. Its totient is φ = 4577285232.

The previous prime is 5721606511. The next prime is 5721606559. The reversal of 5721606545 is 5456061275.

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 4045850449 + 1675756096 = 63607^2 + 40936^2 .

It is a cyclic number.

It is not a de Polignac number, because 5721606545 - 2²² = 5717412241 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 572160650 + ... + 572160659.

It is an arithmetic number, because the mean of its divisors is an integer number (1716481965).

Almost surely, 2^5721606545 is an apocalyptic number.

It is an amenable number.

5721606545 is a deficient number, since it is larger than the sum of its proper divisors (1144321315).

5721606545 is a wasteful number, since it uses less digits than its factorization.

5721606545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144321314.

The product of its (nonzero) digits is 252000, while the sum is 41.

The square root of 5721606545 is about 75641.3018462797. The cubic root of 5721606545 is about 1788.5702246351.

The spelling of 5721606545 in words is "five billion, seven hundred twenty-one million, six hundred six thousand, five hundred forty-five".