91654254161 has 2 divisors, whose sum is σ = 91654254162. Its totient is φ = 91654254160.

The previous prime is 91654254149. The next prime is 91654254191. The reversal of 91654254161 is 16145245619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47314950400 + 44339303761 = 217520^2 + 210569^2 .

It is an emirp because it is prime and its reverse (16145245619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91654254161 - 2²⁶ = 91587145297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91654254191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45827127080 + 45827127081.

It is an arithmetic number, because the mean of its divisors is an integer number (45827127081).

Almost surely, 2^91654254161 is an apocalyptic number.

It is an amenable number.

91654254161 is a deficient number, since it is larger than the sum of its proper divisors (1).

91654254161 is an equidigital number, since it uses as much as digits as its factorization.

91654254161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 44.

The spelling of 91654254161 in words is "ninety-one billion, six hundred fifty-four million, two hundred fifty-four thousand, one hundred sixty-one".