161130172741 has 4 divisors (see below), whose sum is σ = 161373940684. Its totient is φ = 160886404800.

The previous prime is 161130172699. The next prime is 161130172751. The reversal of 161130172741 is 147271031161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135482150241 + 25648022500 = 368079^2 + 160150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161130172741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161130172697 and 161130172706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161130172751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121882980 + ... + 121884301.

It is an arithmetic number, because the mean of its divisors is an integer number (40343485171).

Almost surely, 2^161130172741 is an apocalyptic number.

It is an amenable number.

161130172741 is a deficient number, since it is larger than the sum of its proper divisors (243767943).

161130172741 is an equidigital number, since it uses as much as digits as its factorization.

161130172741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243767942.

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 161130172741 in words is "one hundred sixty-one billion, one hundred thirty million, one hundred seventy-two thousand, seven hundred forty-one".