9161813543 has 2 divisors, whose sum is σ = 9161813544. Its totient is φ = 9161813542.

The previous prime is 9161813539. The next prime is 9161813569. The reversal of 9161813543 is 3453181619.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9161813543 - 2² = 9161813539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9161813543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9161813593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4580906771 + 4580906772.

It is an arithmetic number, because the mean of its divisors is an integer number (4580906772).

Almost surely, 2^9161813543 is an apocalyptic number.

9161813543 is a deficient number, since it is larger than the sum of its proper divisors (1).

9161813543 is an equidigital number, since it uses as much as digits as its factorization.

9161813543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 9161813543 is about 95717.3628084268. The cubic root of 9161813543 is about 2092.4759879949.

The spelling of 9161813543 in words is "nine billion, one hundred sixty-one million, eight hundred thirteen thousand, five hundred forty-three".