16161000 has 64 divisors (see below), whose sum is σ = 50431680. Its totient is φ = 4308800.

The previous prime is 16160957. The next prime is 16161007. The reversal of 16161000 is 16161.

It is a super-2 number, since 2×16161000² = 522355842000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (16161007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307 + ... + 5693.

It is an arithmetic number, because the mean of its divisors is an integer number (787995).

Almost surely, 2^16161000 is an apocalyptic number.

16161000 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 16161000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25215840).

16161000 is an abundant number, since it is smaller than the sum of its proper divisors (34270680).

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

16161000 is a wasteful number, since it uses less digits than its factorization.

16161000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411 (or 5397 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 16161000 is about 4020.0746261730. The cubic root of 16161000 is about 252.8265878274.

Adding to 16161000 its reverse (16161), we get a palindrome (16177161).

16161000 divided by its reverse (16161) gives a cube (1000 = 10³).

The spelling of 16161000 in words is "sixteen million, one hundred sixty-one thousand".