161442317574 has 12 divisors (see below), whose sum is σ = 349791688116. Its totient is φ = 53814105852.

The previous prime is 161442317497. The next prime is 161442317609. The reversal of 161442317574 is 475713244161.

161442317574 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 42 + 31 + 7 + 574 = 666.

It is a super-3 number, since 3×161442317574³ (a number of 35 digits) contains 333 as substring.

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 5 ways as a sum of consecutive naturals, for example, 4484508804 + ... + 4484508839.

It is an arithmetic number, because the mean of its divisors is an integer number (29149307343).

Almost surely, 2^161442317574 is an apocalyptic number.

161442317574 is an abundant number, since it is smaller than the sum of its proper divisors (188349370542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161442317574 is a wasteful number, since it uses less digits than its factorization.

161442317574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8969017651 (or 8969017648 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The spelling of 161442317574 in words is "one hundred sixty-one billion, four hundred forty-two million, three hundred seventeen thousand, five hundred seventy-four".