165491814 has 16 divisors (see below), whose sum is σ = 336594240. Its totient is φ = 54228840.

The previous prime is 165491813. The next prime is 165491819. The reversal of 165491814 is 418194561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165491813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233392 + ... + 234099.

It is an arithmetic number, because the mean of its divisors is an integer number (21037140).

Almost surely, 2^165491814 is an apocalyptic number.

165491814 is an abundant number, since it is smaller than the sum of its proper divisors (171102426).

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

165491814 is a wasteful number, since it uses less digits than its factorization.

165491814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467555.

The product of its digits is 34560, while the sum is 39.

The square root of 165491814 is about 12864.3621684093. The cubic root of 165491814 is about 549.0250651294.

The spelling of 165491814 in words is "one hundred sixty-five million, four hundred ninety-one thousand, eight hundred fourteen".