161836100 has 36 divisors (see below), whose sum is σ = 353977344. Its totient is φ = 64219680.

The previous prime is 161836099. The next prime is 161836117. The reversal of 161836100 is 1638161.

It is a self number, because there is not a number n which added to its sum of digits gives 161836100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6329 + ... + 19071.

It is an arithmetic number, because the mean of its divisors is an integer number (9832704).

Almost surely, 2^161836100 is an apocalyptic number.

161836100 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 161836100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176988672).

161836100 is an abundant number, since it is smaller than the sum of its proper divisors (192141244).

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

161836100 is a wasteful number, since it uses less digits than its factorization.

161836100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12884 (or 12877 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 161836100 is about 12721.4818319251. The cubic root of 161836100 is about 544.9522725649.

The spelling of 161836100 in words is "one hundred sixty-one million, eight hundred thirty-six thousand, one hundred".