9166538681941 has 2 divisors, whose sum is σ = 9166538681942. Its totient is φ = 9166538681940.

The previous prime is 9166538681933. The next prime is 9166538681957. The reversal of 9166538681941 is 1491868356619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7238634201841 + 1927904480100 = 2690471^2 + 1388490^2 .

It is a cyclic number.

It is not a de Polignac number, because 9166538681941 - 2³ = 9166538681933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9166538682941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4583269340970 + 4583269340971.

It is an arithmetic number, because the mean of its divisors is an integer number (4583269340971).

Almost surely, 2^{9166538681941} is an apocalyptic number.

It is an amenable number.

9166538681941 is a deficient number, since it is larger than the sum of its proper divisors (1).

9166538681941 is an equidigital number, since it uses as much as digits as its factorization.

9166538681941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67184640, while the sum is 67.

The spelling of 9166538681941 in words is "nine trillion, one hundred sixty-six billion, five hundred thirty-eight million, six hundred eighty-one thousand, nine hundred forty-one".