161344980 has 96 divisors (see below), whose sum is σ = 519321600. Its totient is φ = 41537664.

The previous prime is 161344973. The next prime is 161344993. The reversal of 161344980 is 89443161.

161344980 is a `hidden beast` number, since 161 + 3 + 4 + 498 + 0 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 31 ways as a sum of consecutive naturals, for example, 10509 + ... + 20811.

It is an arithmetic number, because the mean of its divisors is an integer number (5409600).

Almost surely, 2^161344980 is an apocalyptic number.

161344980 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 161344980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259660800).

161344980 is an abundant number, since it is smaller than the sum of its proper divisors (357976620).

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

161344980 is a wasteful number, since it uses less digits than its factorization.

161344980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10350 (or 10342 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 161344980 is about 12702.1643824980. The cubic root of 161344980 is about 544.4004629503.

The spelling of 161344980 in words is "one hundred sixty-one million, three hundred forty-four thousand, nine hundred eighty".