164320555 has 32 divisors (see below), whose sum is σ = 239711616. Its totient is φ = 105560064.

The previous prime is 164320549. The next prime is 164320561. The reversal of 164320555 is 555023461.

It is an interprime number because it is at equal distance from previous prime (164320549) and next prime (164320561).

It is a cyclic number.

It is not a de Polignac number, because 164320555 - 2⁵ = 164320523 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164317 + ... + 165313.

It is an arithmetic number, because the mean of its divisors is an integer number (7490988).

Almost surely, 2^164320555 is an apocalyptic number.

164320555 is a deficient number, since it is larger than the sum of its proper divisors (75391061).

164320555 is a wasteful number, since it uses less digits than its factorization.

164320555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 164320555 is about 12818.7579351511. The cubic root of 164320555 is about 547.7267660822.

The spelling of 164320555 in words is "one hundred sixty-four million, three hundred twenty thousand, five hundred fifty-five".