5126662561 has 2 divisors, whose sum is σ = 5126662562. Its totient is φ = 5126662560.

The previous prime is 5126662559. The next prime is 5126662609. The reversal of 5126662561 is 1652666215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3703939600 + 1422722961 = 60860^2 + 37719^2 .

It is a cyclic number.

It is not a de Polignac number, because 5126662561 - 2¹ = 5126662559 is a prime.

Together with 5126662559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5126662531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2563331280 + 2563331281.

It is an arithmetic number, because the mean of its divisors is an integer number (2563331281).

Almost surely, 2^5126662561 is an apocalyptic number.

It is an amenable number.

5126662561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5126662561 is an equidigital number, since it uses as much as digits as its factorization.

5126662561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 5126662561 is about 71600.7162045185. The cubic root of 5126662561 is about 1724.2950348807.

The spelling of 5126662561 in words is "five billion, one hundred twenty-six million, six hundred sixty-two thousand, five hundred sixty-one".