161098500 has 96 divisors (see below), whose sum is σ = 472268160. Its totient is φ = 42672000.

The previous prime is 161098411. The next prime is 161098501. The reversal of 161098500 is 5890161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (161098501) by changing a digit.

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, 316246 + ... + 316754.

It is an arithmetic number, because the mean of its divisors is an integer number (4919460).

Almost surely, 2^161098500 is an apocalyptic number.

161098500 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 161098500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236134080).

161098500 is an abundant number, since it is smaller than the sum of its proper divisors (311169660).

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

161098500 is a wasteful number, since it uses less digits than its factorization.

161098500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 161098500 is about 12692.4583907138. The cubic root of 161098500 is about 544.1231023673.

It can be divided in two parts, 16 and 1098500, that multiplied together give a cube (17576000 = 260³).

The spelling of 161098500 in words is "one hundred sixty-one million, ninety-eight thousand, five hundred".