16081650 has 72 divisors (see below), whose sum is σ = 46546500. Its totient is φ = 3957120.

The previous prime is 16081633. The next prime is 16081679. The reversal of 16081650 is 5618061.

16081650 is a `hidden beast` number, since 1 + 6 + 0 + 8 + 1 + 650 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 848241 + 15233409 = 921^2 + 3903^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4476 + ... + 7224.

Almost surely, 2^16081650 is an apocalyptic number.

16081650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16081650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23273250).

16081650 is an abundant number, since it is smaller than the sum of its proper divisors (30464850).

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

16081650 is a wasteful number, since it uses less digits than its factorization.

16081650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780 (or 2772 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 16081650 is about 4010.1932621758. The cubic root of 16081650 is about 252.4121185525.

It can be divided in two parts, 160 and 81650, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 16081650 in words is "sixteen million, eighty-one thousand, six hundred fifty".