8161362779 has 2 divisors, whose sum is σ = 8161362780. Its totient is φ = 8161362778.

The previous prime is 8161362751. The next prime is 8161362791. The reversal of 8161362779 is 9772631618.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8161362779 is a prime.

It is not a weakly prime, because it can be changed into another prime (8161362709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080681389 + 4080681390.

It is an arithmetic number, because the mean of its divisors is an integer number (4080681390).

Almost surely, 2^8161362779 is an apocalyptic number.

8161362779 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161362779 is an equidigital number, since it uses as much as digits as its factorization.

8161362779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 50.

The square root of 8161362779 is about 90340.2611187282. The cubic root of 8161362779 is about 2013.3574883955.

The spelling of 8161362779 in words is "eight billion, one hundred sixty-one million, three hundred sixty-two thousand, seven hundred seventy-nine".