161508120 has 128 divisors (see below), whose sum is σ = 498700800. Its totient is φ = 41831424.

The previous prime is 161508107. The next prime is 161508133. The reversal of 161508120 is 21805161.

It is an interprime number because it is at equal distance from previous prime (161508107) and next prime (161508133).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 902191 + ... + 902369.

It is an arithmetic number, because the mean of its divisors is an integer number (3896100).

Almost surely, 2^161508120 is an apocalyptic number.

161508120 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 161508120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249350400).

161508120 is an abundant number, since it is smaller than the sum of its proper divisors (337192680).

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

161508120 is a wasteful number, since it uses less digits than its factorization.

161508120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 161508120 is about 12708.5845002502. The cubic root of 161508120 is about 544.5838868463.

The spelling of 161508120 in words is "one hundred sixty-one million, five hundred eight thousand, one hundred twenty".