161130924505 has 8 divisors (see below), whose sum is σ = 195068234952. Its totient is φ = 127763989248.

The previous prime is 161130924503. The next prime is 161130924517. The reversal of 161130924505 is 505429031161.

It can be written as a sum of positive squares in 4 ways, for example, as 2650499289 + 158480425216 = 51483^2 + 398096^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161130924505 - 2¹ = 161130924503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161130924503) 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 7 ways as a sum of consecutive naturals, for example, 142593174 + ... + 142594303.

It is an arithmetic number, because the mean of its divisors is an integer number (24383529369).

Almost surely, 2^161130924505 is an apocalyptic number.

It is an amenable number.

161130924505 is a deficient number, since it is larger than the sum of its proper divisors (33937310447).

161130924505 is a wasteful number, since it uses less digits than its factorization.

161130924505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285187595.

The product of its (nonzero) digits is 32400, while the sum is 37.

Adding to 161130924505 its reverse (505429031161), we get a palindrome (666559955666).

The spelling of 161130924505 in words is "one hundred sixty-one billion, one hundred thirty million, nine hundred twenty-four thousand, five hundred five".