8161874078933 has 2 divisors, whose sum is σ = 8161874078934. Its totient is φ = 8161874078932.

The previous prime is 8161874078909. The next prime is 8161874078983. The reversal of 8161874078933 is 3398704781618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5957026252804 + 2204847826129 = 2440702^2 + 1484873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8161874078933 is a prime.

It is a super-2 number, since 2×8161874078933² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8161874078933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8161874078903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080937039466 + 4080937039467.

It is an arithmetic number, because the mean of its divisors is an integer number (4080937039467).

Almost surely, 2^{8161874078933} is an apocalyptic number.

It is an amenable number.

8161874078933 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161874078933 is an equidigital number, since it uses as much as digits as its factorization.

8161874078933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48771072, while the sum is 65.

The spelling of 8161874078933 in words is "eight trillion, one hundred sixty-one billion, eight hundred seventy-four million, seventy-eight thousand, nine hundred thirty-three".