163664995 has 16 divisors (see below), whose sum is σ = 213060960. Its totient is φ = 119971584.

The previous prime is 163664959. The next prime is 163664999. The reversal of 163664995 is 599466361.

It is a cyclic number.

It is not a de Polignac number, because 163664995 - 2⁷ = 163664867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163664999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285 + ... + 18094.

It is an arithmetic number, because the mean of its divisors is an integer number (13316310).

Almost surely, 2^163664995 is an apocalyptic number.

163664995 is a deficient number, since it is larger than the sum of its proper divisors (49395965).

163664995 is a wasteful number, since it uses less digits than its factorization.

163664995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18534.

The product of its digits is 1049760, while the sum is 49.

The square root of 163664995 is about 12793.1620407153. The cubic root of 163664995 is about 546.9974064828.

The spelling of 163664995 in words is "one hundred sixty-three million, six hundred sixty-four thousand, nine hundred ninety-five".