9338536561 has 2 divisors, whose sum is σ = 9338536562. Its totient is φ = 9338536560.

The previous prime is 9338536483. The next prime is 9338536591. The reversal of 9338536561 is 1656358339.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9286984161 + 51552400 = 96369^2 + 7180^2 .

It is an emirp because it is prime and its reverse (1656358339) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9338536561 - 2⁷ = 9338536433 is a prime.

It is a super-2 number, since 2×9338536561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9338536591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4669268280 + 4669268281.

It is an arithmetic number, because the mean of its divisors is an integer number (4669268281).

Almost surely, 2^9338536561 is an apocalyptic number.

It is an amenable number.

9338536561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9338536561 is an equidigital number, since it uses as much as digits as its factorization.

9338536561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1749600, while the sum is 49.

The square root of 9338536561 is about 96636.1038173622. The cubic root of 9338536561 is about 2105.8443819751.

The spelling of 9338536561 in words is "nine billion, three hundred thirty-eight million, five hundred thirty-six thousand, five hundred sixty-one".