161080780 has 96 divisors (see below), whose sum is σ = 417384576. Its totient is φ = 50958336.

The previous prime is 161080757. The next prime is 161080781. The reversal of 161080780 is 87080161.

It is not an unprimeable number, because it can be changed into a prime (161080781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125502 + ... + 126778.

It is an arithmetic number, because the mean of its divisors is an integer number (4347756).

Almost surely, 2^161080780 is an apocalyptic number.

161080780 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 161080780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208692288).

161080780 is an abundant number, since it is smaller than the sum of its proper divisors (256303796).

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

161080780 is a wasteful number, since it uses less digits than its factorization.

161080780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363 (or 1361 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 161080780 is about 12691.7603191992. The cubic root of 161080780 is about 544.1031513954.

The spelling of 161080780 in words is "one hundred sixty-one million, eighty thousand, seven hundred eighty".