5137665521 has 2 divisors, whose sum is σ = 5137665522. Its totient is φ = 5137665520.

The previous prime is 5137665497. The next prime is 5137665527. The reversal of 5137665521 is 1255667315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3131969296 + 2005696225 = 55964^2 + 44785^2 .

It is a cyclic number.

It is not a de Polignac number, because 5137665521 - 2¹⁴ = 5137649137 is a prime.

It is not a weakly prime, because it can be changed into another prime (5137665527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2568832760 + 2568832761.

It is an arithmetic number, because the mean of its divisors is an integer number (2568832761).

Almost surely, 2^5137665521 is an apocalyptic number.

It is an amenable number.

5137665521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5137665521 is an equidigital number, since it uses as much as digits as its factorization.

5137665521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189000, while the sum is 41.

The square root of 5137665521 is about 71677.5105664252. The cubic root of 5137665521 is about 1725.5277271874.

The spelling of 5137665521 in words is "five billion, one hundred thirty-seven million, six hundred sixty-five thousand, five hundred twenty-one".