161747589203 has 4 divisors (see below), whose sum is σ = 164399189088. Its totient is φ = 159095989320.

The previous prime is 161747589197. The next prime is 161747589221. The reversal of 161747589203 is 302985747161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302985747161 = 27481 ⋅11025281.

It is a cyclic number.

It is not a de Polignac number, because 161747589203 - 2⁴ = 161747589187 is a prime.

It is a super-2 number, since 2×161747589203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161747589253) 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 3 ways as a sum of consecutive naturals, for example, 1325799851 + ... + 1325799972.

It is an arithmetic number, because the mean of its divisors is an integer number (41099797272).

It is a 2-persistent number, because it is pandigital, and so is 2⋅161747589203 = 323495178406, but 3⋅161747589203 = 485242767609 is not.

Almost surely, 2^161747589203 is an apocalyptic number.

161747589203 is a deficient number, since it is larger than the sum of its proper divisors (2651599885).

161747589203 is an equidigital number, since it uses as much as digits as its factorization.

161747589203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2651599884.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 161747589203 in words is "one hundred sixty-one billion, seven hundred forty-seven million, five hundred eighty-nine thousand, two hundred three".