161140424929 has 9 divisors (see below), whose sum is σ = 177126147219. Its totient is φ = 146487281160.

The previous prime is 161140424917. The next prime is 161140424941. The reversal of 161140424929 is 929424041161.

The square root of 161140424929 is 401423.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (161140424917) and next prime (161140424941).

It can be written as a sum of positive squares in only one way, i.e., 5472300625 + 155668124304 = 73975^2 + 394548^2 .

It is not a de Polignac number, because 161140424929 - 2⁷ = 161140424801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161140424629) 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 in 8 ways as a sum of consecutive naturals, for example, 4397407 + ... + 4433899.

Almost surely, 2^161140424929 is an apocalyptic number.

161140424929 is the 401423-rd square number.

161140424929 is the 200712-nd centered octagonal number.

It is an amenable number.

161140424929 is a deficient number, since it is larger than the sum of its proper divisors (15985722290).

161140424929 is an frugal number, since it uses more digits than its factorization.

161140424929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73008 (or 36504 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 161140424929 in words is "one hundred sixty-one billion, one hundred forty million, four hundred twenty-four thousand, nine hundred twenty-nine".