161445113429 has 2 divisors, whose sum is σ = 161445113430. Its totient is φ = 161445113428.

The previous prime is 161445113419. The next prime is 161445113507. The reversal of 161445113429 is 924311544161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88988856100 + 72456257329 = 298310^2 + 269177^2 .

It is a cyclic number.

It is not a de Polignac number, because 161445113429 - 2¹² = 161445109333 is a prime.

It is a super-2 number, since 2×161445113429² (a number of 23 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 (161445113419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80722556714 + 80722556715.

It is an arithmetic number, because the mean of its divisors is an integer number (80722556715).

Almost surely, 2^161445113429 is an apocalyptic number.

It is an amenable number.

161445113429 is a deficient number, since it is larger than the sum of its proper divisors (1).

161445113429 is an equidigital number, since it uses as much as digits as its factorization.

161445113429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The spelling of 161445113429 in words is "one hundred sixty-one billion, four hundred forty-five million, one hundred thirteen thousand, four hundred twenty-nine".