165144605406 has 32 divisors (see below), whose sum is σ = 360335001600. Its totient is φ = 50041111680.

The previous prime is 165144605383. The next prime is 165144605413. The reversal of 165144605406 is 604506441561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1400550 + ... + 1513878.

It is an arithmetic number, because the mean of its divisors is an integer number (11260468800).

Almost surely, 2^165144605406 is an apocalyptic number.

165144605406 is an abundant number, since it is smaller than the sum of its proper divisors (195190396194).

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

165144605406 is a wasteful number, since it uses less digits than its factorization.

165144605406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135424.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 165144605406 in words is "one hundred sixty-five billion, one hundred forty-four million, six hundred five thousand, four hundred six".