161316340 has 24 divisors (see below), whose sum is σ = 341044200. Its totient is φ = 64092288.

The previous prime is 161316313. The next prime is 161316367. The reversal of 161316340 is 43613161.

It is a happy number.

161316340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161316313) and next prime (161316367).

It can be written as a sum of positive squares in 4 ways, for example, as 11792356 + 149523984 = 3434^2 + 12228^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24087 + ... + 30046.

It is an arithmetic number, because the mean of its divisors is an integer number (14210175).

Almost surely, 2^161316340 is an apocalyptic number.

161316340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161316340 is an abundant number, since it is smaller than the sum of its proper divisors (179727860).

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

161316340 is a wasteful number, since it uses less digits than its factorization.

161316340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54291 (or 54289 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 161316340 is about 12701.0369655395. The cubic root of 161316340 is about 544.3682492595.

The spelling of 161316340 in words is "one hundred sixty-one million, three hundred sixteen thousand, three hundred forty".