5656216537 has 2 divisors, whose sum is σ = 5656216538. Its totient is φ = 5656216536.

The previous prime is 5656216513. The next prime is 5656216597. The reversal of 5656216537 is 7356126565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4857532416 + 798684121 = 69696^2 + 28261^2 .

It is a cyclic number.

It is not a de Polignac number, because 5656216537 - 2¹⁵ = 5656183769 is a prime.

It is not a weakly prime, because it can be changed into another prime (5656216597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828108268 + 2828108269.

It is an arithmetic number, because the mean of its divisors is an integer number (2828108269).

Almost surely, 2^5656216537 is an apocalyptic number.

It is an amenable number.

5656216537 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656216537 is an equidigital number, since it uses as much as digits as its factorization.

5656216537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 46.

The square root of 5656216537 is about 75207.8223125760. The cubic root of 5656216537 is about 1781.7304781484.

The spelling of 5656216537 in words is "five billion, six hundred fifty-six million, two hundred sixteen thousand, five hundred thirty-seven".