163664855 has 8 divisors (see below), whose sum is σ = 197811600. Its totient is φ = 129989376.

The previous prime is 163664833. The next prime is 163664861. The reversal of 163664855 is 558466361.

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

It is a cyclic number.

It is not a de Polignac number, because 163664855 - 2⁶ = 163664791 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117050 + ... + 118439.

It is an arithmetic number, because the mean of its divisors is an integer number (24726450).

Almost surely, 2^163664855 is an apocalyptic number.

163664855 is a deficient number, since it is larger than the sum of its proper divisors (34146745).

163664855 is a wasteful number, since it uses less digits than its factorization.

163664855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235633.

The product of its digits is 518400, while the sum is 44.

The square root of 163664855 is about 12793.1565690411. The cubic root of 163664855 is about 546.9972505145.

The spelling of 163664855 in words is "one hundred sixty-three million, six hundred sixty-four thousand, eight hundred fifty-five".