164520549 has 12 divisors (see below), whose sum is σ = 238502316. Its totient is φ = 109282752.

The previous prime is 164520547. The next prime is 164520569. The reversal of 164520549 is 945025461.

164520549 is a `hidden beast` number, since 1 + 64 + 52 + 0 + 549 = 666.

164520549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 74080449 + 90440100 = 8607^2 + 9510^2 .

It is not a de Polignac number, because 164520549 - 2¹ = 164520547 is a prime.

It is a super-2 number, since 2×164520549² = 54134022086522802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164520547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30504 + ... + 35489.

It is an arithmetic number, because the mean of its divisors is an integer number (19875193).

Almost surely, 2^164520549 is an apocalyptic number.

It is an amenable number.

164520549 is a deficient number, since it is larger than the sum of its proper divisors (73981767).

164520549 is a wasteful number, since it uses less digits than its factorization.

164520549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66276 (or 66273 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 164520549 is about 12826.5563967887. The cubic root of 164520549 is about 547.9488881326.

The spelling of 164520549 in words is "one hundred sixty-four million, five hundred twenty thousand, five hundred forty-nine".