165216303856 has 20 divisors (see below), whose sum is σ = 326146337352. Its totient is φ = 81049507136.

The previous prime is 165216303823. The next prime is 165216303871. The reversal of 165216303856 is 658303612561.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97414426 + ... + 97416121.

Almost surely, 2^165216303856 is an apocalyptic number.

165216303856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165216303856 is a deficient number, since it is larger than the sum of its proper divisors (160930033496).

165216303856 is a wasteful number, since it uses less digits than its factorization.

165216303856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194830608 (or 194830602 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 165216303856 in words is "one hundred sixty-five billion, two hundred sixteen million, three hundred three thousand, eight hundred fifty-six".