165490456 has 16 divisors (see below), whose sum is σ = 326626200. Its totient is φ = 78390144.

The previous prime is 165490447. The next prime is 165490459. The reversal of 165490456 is 654094561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165490459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544225 + ... + 544528.

Almost surely, 2^165490456 is an apocalyptic number.

It is an amenable number.

165490456 is a deficient number, since it is larger than the sum of its proper divisors (161135744).

165490456 is a wasteful number, since it uses less digits than its factorization.

165490456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088778 (or 1088774 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 165490456 is about 12864.3093868268. The cubic root of 165490456 is about 549.0235633873.

The spelling of 165490456 in words is "one hundred sixty-five million, four hundred ninety thousand, four hundred fifty-six".