5642564657 has 2 divisors, whose sum is σ = 5642564658. Its totient is φ = 5642564656.

The previous prime is 5642564647. The next prime is 5642564693. The reversal of 5642564657 is 7564652465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5631601936 + 10962721 = 75044^2 + 3311^2 .

It is a cyclic number.

It is not a de Polignac number, because 5642564657 - 2¹⁸ = 5642302513 is a prime.

It is not a weakly prime, because it can be changed into another prime (5642564617) 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 as a sum of consecutive naturals, namely, 2821282328 + 2821282329.

It is an arithmetic number, because the mean of its divisors is an integer number (2821282329).

Almost surely, 2^5642564657 is an apocalyptic number.

It is an amenable number.

5642564657 is a deficient number, since it is larger than the sum of its proper divisors (1).

5642564657 is an equidigital number, since it uses as much as digits as its factorization.

5642564657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048000, while the sum is 50.

The square root of 5642564657 is about 75117.0064432815. The cubic root of 5642564657 is about 1780.2958580097.

The spelling of 5642564657 in words is "five billion, six hundred forty-two million, five hundred sixty-four thousand, six hundred fifty-seven".