8161874087149 has 2 divisors, whose sum is σ = 8161874087150. Its totient is φ = 8161874087148.

The previous prime is 8161874087069. The next prime is 8161874087153. The reversal of 8161874087149 is 9417804781618.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7561636524649 + 600237562500 = 2749843^2 + 774750^2 .

It is a cyclic number.

It is not a de Polignac number, because 8161874087149 - 2¹⁹ = 8161873562861 is a prime.

It is a super-2 number, since 2×8161874087149² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8161874087179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080937043574 + 4080937043575.

It is an arithmetic number, because the mean of its divisors is an integer number (4080937043575).

Almost surely, 2^{8161874087149} is an apocalyptic number.

It is an amenable number.

8161874087149 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161874087149 is an equidigital number, since it uses as much as digits as its factorization.

8161874087149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21676032, while the sum is 64.

The spelling of 8161874087149 in words is "eight trillion, one hundred sixty-one billion, eight hundred seventy-four million, eighty-seven thousand, one hundred forty-nine".