161745087385 has 16 divisors (see below), whose sum is σ = 234870178176. Its totient is φ = 104386745088.

The previous prime is 161745087373. The next prime is 161745087397. The reversal of 161745087385 is 583780547161.

It is an interprime number because it is at equal distance from previous prime (161745087373) and next prime (161745087397).

It is a cyclic number.

It is not a de Polignac number, because 161745087385 - 2⁹ = 161745086873 is a prime.

It is a super-2 number, since 2×161745087385² (a number of 23 digits) contains 22 as substring.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 135919647 + ... + 135920836.

It is an arithmetic number, because the mean of its divisors is an integer number (14679386136).

Almost surely, 2^161745087385 is an apocalyptic number.

It is an amenable number.

161745087385 is a deficient number, since it is larger than the sum of its proper divisors (73125090791).

161745087385 is a wasteful number, since it uses less digits than its factorization.

161745087385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271840512.

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 161745087385 in words is "one hundred sixty-one billion, seven hundred forty-five million, eighty-seven thousand, three hundred eighty-five".