161890230960 has 160 divisors (see below), whose sum is σ = 560058648000. Its totient is φ = 42982078464.

The previous prime is 161890230923. The next prime is 161890230973. The reversal of 161890230960 is 69032098161.

It is a happy number.

161890230960 is a `hidden beast` number, since 1 + 618 + 9 + 0 + 23 + 0 + 9 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 31 ways as a sum of consecutive naturals, for example, 330996 + ... + 658284.

It is an arithmetic number, because the mean of its divisors is an integer number (3500366550).

Almost surely, 2^161890230960 is an apocalyptic number.

161890230960 is a gapful number since it is divisible by the number (10) 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 161890230960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280029324000).

161890230960 is an abundant number, since it is smaller than the sum of its proper divisors (398168417040).

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

161890230960 is a wasteful number, since it uses less digits than its factorization.

161890230960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327540 (or 327528 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 161890230960 in words is "one hundred sixty-one billion, eight hundred ninety million, two hundred thirty thousand, nine hundred sixty".