8161473771887 has 2 divisors, whose sum is σ = 8161473771888. Its totient is φ = 8161473771886.

The previous prime is 8161473771863. The next prime is 8161473771931. The reversal of 8161473771887 is 7881773741618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8161473771887 - 2³⁸ = 7886595864943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8161473771287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080736885943 + 4080736885944.

It is an arithmetic number, because the mean of its divisors is an integer number (4080736885944).

Almost surely, 2^{8161473771887} is an apocalyptic number.

8161473771887 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161473771887 is an equidigital number, since it uses as much as digits as its factorization.

8161473771887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88510464, while the sum is 68.

The spelling of 8161473771887 in words is "eight trillion, one hundred sixty-one billion, four hundred seventy-three million, seven hundred seventy-one thousand, eight hundred eighty-seven".