9418564261 has 2 divisors, whose sum is σ = 9418564262. Its totient is φ = 9418564260.

The previous prime is 9418564241. The next prime is 9418564279. The reversal of 9418564261 is 1624658149.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7365930625 + 2052633636 = 85825^2 + 45306^2 .

It is a cyclic number.

It is not a de Polignac number, because 9418564261 - 2¹⁹ = 9418039973 is a prime.

It is a super-2 number, since 2×9418564261² (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 (9418564241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4709282130 + 4709282131.

It is an arithmetic number, because the mean of its divisors is an integer number (4709282131).

Almost surely, 2^9418564261 is an apocalyptic number.

It is an amenable number.

9418564261 is a deficient number, since it is larger than the sum of its proper divisors (1).

9418564261 is an equidigital number, since it uses as much as digits as its factorization.

9418564261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 46.

The square root of 9418564261 is about 97049.2877923378. The cubic root of 9418564261 is about 2111.8427079930.

The spelling of 9418564261 in words is "nine billion, four hundred eighteen million, five hundred sixty-four thousand, two hundred sixty-one".