164243555 has 32 divisors (see below), whose sum is σ = 235799424. Its totient is φ = 107467776.

The previous prime is 164243539. The next prime is 164243567. The reversal of 164243555 is 555342461.

It is a cyclic number.

It is not a de Polignac number, because 164243555 - 2⁴ = 164243539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 67439 + ... + 69831.

It is an arithmetic number, because the mean of its divisors is an integer number (7368732).

Almost surely, 2^164243555 is an apocalyptic number.

164243555 is a deficient number, since it is larger than the sum of its proper divisors (71555869).

164243555 is a wasteful number, since it uses less digits than its factorization.

164243555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its digits is 72000, while the sum is 35.

The square root of 164243555 is about 12815.7541721118. The cubic root of 164243555 is about 547.6411984745.

The spelling of 164243555 in words is "one hundred sixty-four million, two hundred forty-three thousand, five hundred fifty-five".