161745850375 has 8 divisors (see below), whose sum is σ = 201858821424. Its totient is φ = 129396680200.

The previous prime is 161745850361. The next prime is 161745850397. The reversal of 161745850375 is 573058547161.

It is not a de Polignac number, because 161745850375 - 2¹⁹ = 161745326087 is a prime.

It is a super-3 number, since 3×161745850375³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 646983277 + ... + 646983526.

It is an arithmetic number, because the mean of its divisors is an integer number (25232352678).

Almost surely, 2^161745850375 is an apocalyptic number.

161745850375 is a deficient number, since it is larger than the sum of its proper divisors (40112971049).

161745850375 is an equidigital number, since it uses as much as digits as its factorization.

161745850375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293966818 (or 1293966808 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 161745850375 in words is "one hundred sixty-one billion, seven hundred forty-five million, eight hundred fifty thousand, three hundred seventy-five".