9718064261 has 2 divisors, whose sum is σ = 9718064262. Its totient is φ = 9718064260.

The previous prime is 9718064243. The next prime is 9718064281. The reversal of 9718064261 is 1624608179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9602824036 + 115240225 = 97994^2 + 10735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9718064261 is a prime.

It is a super-2 number, since 2×9718064261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9718064201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4859032130 + 4859032131.

It is an arithmetic number, because the mean of its divisors is an integer number (4859032131).

Almost surely, 2^9718064261 is an apocalyptic number.

It is an amenable number.

9718064261 is a deficient number, since it is larger than the sum of its proper divisors (1).

9718064261 is an equidigital number, since it uses as much as digits as its factorization.

9718064261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 9718064261 is about 98580.2427517806. The cubic root of 9718064261 is about 2133.9943021549.

The spelling of 9718064261 in words is "nine billion, seven hundred eighteen million, sixty-four thousand, two hundred sixty-one".