161844006851 has 2 divisors, whose sum is σ = 161844006852. Its totient is φ = 161844006850.

The previous prime is 161844006791. The next prime is 161844006853. The reversal of 161844006851 is 158600448161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161844006851 - 2⁶ = 161844006787 is a prime.

Together with 161844006853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161844006853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80922003425 + 80922003426.

It is an arithmetic number, because the mean of its divisors is an integer number (80922003426).

Almost surely, 2^161844006851 is an apocalyptic number.

161844006851 is a deficient number, since it is larger than the sum of its proper divisors (1).

161844006851 is an equidigital number, since it uses as much as digits as its factorization.

161844006851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 161844006851 in words is "one hundred sixty-one billion, eight hundred forty-four million, six thousand, eight hundred fifty-one".