168561450 has 72 divisors (see below), whose sum is σ = 455783328. Its totient is φ = 44660640.

The previous prime is 168561439. The next prime is 168561469. The reversal of 168561450 is 54165861.

168561450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×168561450² = 56825924852205000, which contains 22 as substring.

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, 74029 + ... + 76271.

It is an arithmetic number, because the mean of its divisors is an integer number (6330324).

Almost surely, 2^168561450 is an apocalyptic number.

168561450 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 168561450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227891664).

168561450 is an abundant number, since it is smaller than the sum of its proper divisors (287221878).

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

168561450 is a wasteful number, since it uses less digits than its factorization.

168561450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428 (or 2420 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 168561450 is about 12983.1217355457. The cubic root of 168561450 is about 552.3988335342.

The spelling of 168561450 in words is "one hundred sixty-eight million, five hundred sixty-one thousand, four hundred fifty".