161639832174 has 32 divisors (see below), whose sum is σ = 343282634496. Its totient is φ = 50564384640.

The previous prime is 161639832173. The next prime is 161639832199. The reversal of 161639832174 is 471238936161.

161639832174 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161639832174² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161639832173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2248042 + ... + 2318829.

It is an arithmetic number, because the mean of its divisors is an integer number (10727582328).

Almost surely, 2^161639832174 is an apocalyptic number.

161639832174 is an abundant number, since it is smaller than the sum of its proper divisors (181642802322).

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

161639832174 is a wasteful number, since it uses less digits than its factorization.

161639832174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4567240.

The product of its digits is 1306368, while the sum is 51.

The spelling of 161639832174 in words is "one hundred sixty-one billion, six hundred thirty-nine million, eight hundred thirty-two thousand, one hundred seventy-four".