999974000161 has 2 divisors, whose sum is σ = 999974000162. Its totient is φ = 999974000160.

The previous prime is 999974000101. The next prime is 999974000219. The reversal of 999974000161 is 161000479999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 971722777600 + 28251222561 = 985760^2 + 168081^2 .

It is a cyclic number.

It is not a de Polignac number, because 999974000161 - 2¹⁵ = 999973967393 is a prime.

It is not a weakly prime, because it can be changed into another prime (999974000101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499987000080 + 499987000081.

It is an arithmetic number, because the mean of its divisors is an integer number (499987000081).

Almost surely, 2^999974000161 is an apocalyptic number.

It is an amenable number.

999974000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

999974000161 is an equidigital number, since it uses as much as digits as its factorization.

999974000161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 999974000161 in words is "nine hundred ninety-nine billion, nine hundred seventy-four million, one hundred sixty-one", and thus it is an aban number.