161508000 has 192 divisors, whose sum is σ = 543134592. Its totient is φ = 41932800.

The previous prime is 161507993. The next prime is 161508023. The reversal of 161508000 is 805161.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515844 + ... + 516156.

It is an arithmetic number, because the mean of its divisors is an integer number (2828826).

Almost surely, 2^161508000 is an apocalyptic number.

161508000 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 161508000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271567296).

161508000 is an abundant number, since it is smaller than the sum of its proper divisors (381626592).

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

161508000 is a wasteful number, since it uses less digits than its factorization.

161508000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 161508000 is about 12708.5797790312. The cubic root of 161508000 is about 544.5837519716.

The spelling of 161508000 in words is "one hundred sixty-one million, five hundred eight thousand".