16427579326181 has 2 divisors, whose sum is σ = 16427579326182. Its totient is φ = 16427579326180.

The previous prime is 16427579326121. The next prime is 16427579326211. The reversal of 16427579326181 is 18162397572461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13465597202500 + 2961982123681 = 3669550^2 + 1721041^2 .

It is a cyclic number.

It is not a de Polignac number, because 16427579326181 - 2³⁸ = 16152701419237 is a prime.

It is a super-2 number, since 2×16427579326181² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16427579326121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8213789663090 + 8213789663091.

It is an arithmetic number, because the mean of its divisors is an integer number (8213789663091).

Almost surely, 2^{16427579326181} is an apocalyptic number.

It is an amenable number.

16427579326181 is a deficient number, since it is larger than the sum of its proper divisors (1).

16427579326181 is an equidigital number, since it uses as much as digits as its factorization.

16427579326181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 62.

The spelling of 16427579326181 in words is "sixteen trillion, four hundred twenty-seven billion, five hundred seventy-nine million, three hundred twenty-six thousand, one hundred eighty-one".