165156454323646 has 8 divisors (see below), whose sum is σ = 250187500114344. Its totient is φ = 81760620952200.

The previous prime is 165156454323587. The next prime is 165156454323719. The reversal of 165156454323646 is 646323454651561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408803104560 + ... + 408803104963.

It is an arithmetic number, because the mean of its divisors is an integer number (31273437514293).

Almost surely, 2^{165156454323646} is an apocalyptic number.

165156454323646 is a deficient number, since it is larger than the sum of its proper divisors (85031045790698).

165156454323646 is a wasteful number, since it uses less digits than its factorization.

165156454323646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817606209626.

The product of its digits is 186624000, while the sum is 61.

The spelling of 165156454323646 in words is "one hundred sixty-five trillion, one hundred fifty-six billion, four hundred fifty-four million, three hundred twenty-three thousand, six hundred forty-six".