165494898 has 48 divisors (see below), whose sum is σ = 380933280. Its totient is φ = 51746688.

The previous prime is 165494887. The next prime is 165494899. The reversal of 165494898 is 898494561.

165494898 is a `hidden beast` number, since 1 + 6 + 549 + 4 + 8 + 98 = 666.

It is a super-2 number, since 2×165494898² = 54777122528060808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165494899) 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 23 ways as a sum of consecutive naturals, for example, 115261 + ... + 116687.

It is an arithmetic number, because the mean of its divisors is an integer number (7936110).

Almost surely, 2^165494898 is an apocalyptic number.

165494898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165494898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190466640).

165494898 is an abundant number, since it is smaller than the sum of its proper divisors (215438382).

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

165494898 is a wasteful number, since it uses less digits than its factorization.

165494898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831 (or 1828 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 165494898 is about 12864.4820338792. The cubic root of 165494898 is about 549.0284755354.

The spelling of 165494898 in words is "one hundred sixty-five million, four hundred ninety-four thousand, eight hundred ninety-eight".