164557573 has 2 divisors, whose sum is σ = 164557574. Its totient is φ = 164557572.

The previous prime is 164557567. The next prime is 164557597. The reversal of 164557573 is 375755461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120494529 + 44063044 = 10977^2 + 6638^2 .

It is a cyclic number.

It is not a de Polignac number, because 164557573 - 2²¹ = 162460421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164557073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82278786 + 82278787.

It is an arithmetic number, because the mean of its divisors is an integer number (82278787).

Almost surely, 2^164557573 is an apocalyptic number.

It is an amenable number.

164557573 is a deficient number, since it is larger than the sum of its proper divisors (1).

164557573 is an equidigital number, since it uses as much as digits as its factorization.

164557573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 441000, while the sum is 43.

The square root of 164557573 is about 12827.9995712504. Note that the first 3 decimals coincide. The cubic root of 164557573 is about 547.9899888504.

The spelling of 164557573 in words is "one hundred sixty-four million, five hundred fifty-seven thousand, five hundred seventy-three".