161840832544801 has 2 divisors, whose sum is σ = 161840832544802. Its totient is φ = 161840832544800.

The previous prime is 161840832544799. The next prime is 161840832544883. The reversal of 161840832544801 is 108445238048161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127355739040000 + 34485093504801 = 11285200^2 + 5872401^2 .

It is a cyclic number.

It is not a de Polignac number, because 161840832544801 - 2¹ = 161840832544799 is a prime.

Together with 161840832544799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161840832644801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80920416272400 + 80920416272401.

It is an arithmetic number, because the mean of its divisors is an integer number (80920416272401).

Almost surely, 2^{161840832544801} is an apocalyptic number.

It is an amenable number.

161840832544801 is a deficient number, since it is larger than the sum of its proper divisors (1).

161840832544801 is an equidigital number, since it uses as much as digits as its factorization.

161840832544801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5898240, while the sum is 55.

The spelling of 161840832544801 in words is "one hundred sixty-one trillion, eight hundred forty billion, eight hundred thirty-two million, five hundred forty-four thousand, eight hundred one".