164856243 has 8 divisors (see below), whose sum is σ = 220284928. Its totient is φ = 109665864.

The previous prime is 164856239. The next prime is 164856257. The reversal of 164856243 is 342658461.

164856243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 164856243 - 2² = 164856239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164852243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57955 + ... + 60732.

It is an arithmetic number, because the mean of its divisors is an integer number (27535616).

Almost surely, 2^164856243 is an apocalyptic number.

164856243 is a deficient number, since it is larger than the sum of its proper divisors (55428685).

164856243 is a wasteful number, since it uses less digits than its factorization.

164856243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119153.

The product of its digits is 138240, while the sum is 39.

The square root of 164856243 is about 12839.6356256710. The cubic root of 164856243 is about 548.3213202058.

The spelling of 164856243 in words is "one hundred sixty-four million, eight hundred fifty-six thousand, two hundred forty-three".