161172302258 has 54 divisors (see below), whose sum is σ = 269144672349. Its totient is φ = 72331859600.

The previous prime is 161172302189. The next prime is 161172302267. The reversal of 161172302258 is 852203271161.

It can be written as a sum of positive squares in 2 ways, for example, as 103261323649 + 57910978609 = 321343^2 + 240647^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=283877.

It is a super-2 number, since 2×161172302258² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 818133416 + ... + 818133612.

Almost surely, 2^161172302258 is an apocalyptic number.

161172302258 is a deficient number, since it is larger than the sum of its proper divisors (107972370091).

161172302258 is an equidigital number, since it uses as much as digits as its factorization.

161172302258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 161172302258 in words is "one hundred sixty-one billion, one hundred seventy-two million, three hundred two thousand, two hundred fifty-eight".