9618286291261 has 2 divisors, whose sum is σ = 9618286291262. Its totient is φ = 9618286291260.

The previous prime is 9618286291241. The next prime is 9618286291373. The reversal of 9618286291261 is 1621926828169.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9270386862361 + 347899428900 = 3044731^2 + 589830^2 .

It is a cyclic number.

It is not a de Polignac number, because 9618286291261 - 2⁹ = 9618286290749 is a prime.

It is a super-2 number, since 2×9618286291261² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9618286291261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9618286291241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4809143145630 + 4809143145631.

It is an arithmetic number, because the mean of its divisors is an integer number (4809143145631).

Almost surely, 2^{9618286291261} is an apocalyptic number.

It is an amenable number.

9618286291261 is a deficient number, since it is larger than the sum of its proper divisors (1).

9618286291261 is an equidigital number, since it uses as much as digits as its factorization.

9618286291261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 61.

The spelling of 9618286291261 in words is "nine trillion, six hundred eighteen billion, two hundred eighty-six million, two hundred ninety-one thousand, two hundred sixty-one".