161312080 has 20 divisors (see below), whose sum is σ = 375050772. Its totient is φ = 64524800.

The previous prime is 161312059. The next prime is 161312093. The reversal of 161312080 is 80213161.

161312080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 128958736 + 32353344 = 11356^2 + 5688^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1008121 + ... + 1008280.

Almost surely, 2^161312080 is an apocalyptic number.

161312080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161312080 is an abundant number, since it is smaller than the sum of its proper divisors (213738692).

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

161312080 is a wasteful number, since it uses less digits than its factorization.

161312080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016414 (or 2016408 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 161312080 is about 12700.8692615899. The cubic root of 161312080 is about 544.3634573722.

It can be divided in two parts, 1613120 and 80, that multiplied together give a square (129049600 = 11360²).

The spelling of 161312080 in words is "one hundred sixty-one million, three hundred twelve thousand, eighty".