161850913352 has 12 divisors (see below), whose sum is σ = 303472596105. Its totient is φ = 80924887728.

The previous prime is 161850913351. The next prime is 161850913369. The reversal of 161850913352 is 253319058161.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 147897161476 + 13953751876 = 384574^2 + 118126^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=284474.

It is a super-2 number, since 2×161850913352² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161850913351) 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 2 ways as a sum of consecutive naturals, for example, 1066778 + ... + 1209014.

Almost surely, 2^161850913352 is an apocalyptic number.

It is an amenable number.

161850913352 is a deficient number, since it is larger than the sum of its proper divisors (141621682753).

161850913352 is an frugal number, since it uses more digits than its factorization.

161850913352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284480 (or 142239 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 161850913352 in words is "one hundred sixty-one billion, eight hundred fifty million, nine hundred thirteen thousand, three hundred fifty-two".