161706374232 has 128 divisors (see below), whose sum is σ = 437075654400. Its totient is φ = 49560602112.

The previous prime is 161706374161. The next prime is 161706374233. The reversal of 161706374232 is 232473607161.

161706374232 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 2×161706374232² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161706374233) 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 31 ways as a sum of consecutive naturals, for example, 126037063 + ... + 126038345.

It is an arithmetic number, because the mean of its divisors is an integer number (3414653550).

Almost surely, 2^161706374232 is an apocalyptic number.

161706374232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161706374232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218537827200).

161706374232 is an abundant number, since it is smaller than the sum of its proper divisors (275369280168).

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

161706374232 is a wasteful number, since it uses less digits than its factorization.

161706374232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577 (or 2573 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 42.

The spelling of 161706374232 in words is "one hundred sixty-one billion, seven hundred six million, three hundred seventy-four thousand, two hundred thirty-two".