164216615 has 4 divisors (see below), whose sum is σ = 197059944. Its totient is φ = 131373288.

The previous prime is 164216599. The next prime is 164216629. The reversal of 164216615 is 516612461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 516612461 = 653 ⋅791137.

It is a cyclic number.

It is not a de Polignac number, because 164216615 - 2⁴ = 164216599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16421657 + ... + 16421666.

It is an arithmetic number, because the mean of its divisors is an integer number (49264986).

Almost surely, 2^164216615 is an apocalyptic number.

164216615 is a deficient number, since it is larger than the sum of its proper divisors (32843329).

164216615 is an equidigital number, since it uses as much as digits as its factorization.

164216615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32843328.

The product of its digits is 8640, while the sum is 32.

The square root of 164216615 is about 12814.7030788856. The cubic root of 164216615 is about 547.6112546093.

The spelling of 164216615 in words is "one hundred sixty-four million, two hundred sixteen thousand, six hundred fifteen".