164424544385 has 16 divisors (see below), whose sum is σ = 202766303376. Its totient is φ = 127906092288.

The previous prime is 164424544379. The next prime is 164424544397. The reversal of 164424544385 is 583445424461.

It can be written as a sum of positive squares in 8 ways, for example, as 27943802896 + 136480741489 = 167164^2 + 369433^2 .

It is a cyclic number.

It is not a de Polignac number, because 164424544385 - 2¹⁴ = 164424528001 is a prime.

It is a super-3 number, since 3×164424544385³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31379 + ... + 574311.

It is an arithmetic number, because the mean of its divisors is an integer number (12672893961).

Almost surely, 2^164424544385 is an apocalyptic number.

It is an amenable number.

164424544385 is a deficient number, since it is larger than the sum of its proper divisors (38341758991).

164424544385 is a wasteful number, since it uses less digits than its factorization.

164424544385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544612.

The product of its digits is 7372800, while the sum is 50.

The spelling of 164424544385 in words is "one hundred sixty-four billion, four hundred twenty-four million, five hundred forty-four thousand, three hundred eighty-five".