9161653527281 has 2 divisors, whose sum is σ = 9161653527282. Its totient is φ = 9161653527280.

The previous prime is 9161653527179. The next prime is 9161653527337. The reversal of 9161653527281 is 1827253561619.

It is an a-pointer prime, because the next prime (9161653527337) can be obtained adding 9161653527281 to its sum of digits (56).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6542059485025 + 2619594042256 = 2557745^2 + 1618516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9161653527281 is a prime.

It is a super-2 number, since 2×9161653527281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9161652527281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4580826763640 + 4580826763641.

It is an arithmetic number, because the mean of its divisors is an integer number (4580826763641).

Almost surely, 2^{9161653527281} is an apocalyptic number.

It is an amenable number.

9161653527281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9161653527281 is an equidigital number, since it uses as much as digits as its factorization.

9161653527281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 56.

The spelling of 9161653527281 in words is "nine trillion, one hundred sixty-one billion, six hundred fifty-three million, five hundred twenty-seven thousand, two hundred eighty-one".