164725505 has 12 divisors (see below), whose sum is σ = 229943700. Its totient is φ = 112954464.

The previous prime is 164725439. The next prime is 164725541. The reversal of 164725505 is 505527461.

It can be written as a sum of positive squares in 2 ways, for example, as 43020481 + 121705024 = 6559^2 + 11032^2 .

It is not a de Polignac number, because 164725505 - 2¹² = 164721409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335930 + ... + 336419.

It is an arithmetic number, because the mean of its divisors is an integer number (19161975).

Almost surely, 2^164725505 is an apocalyptic number.

It is an amenable number.

164725505 is a deficient number, since it is larger than the sum of its proper divisors (65218195).

164725505 is an equidigital number, since it uses as much as digits as its factorization.

164725505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672368 (or 672361 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 164725505 is about 12834.5434277967. The cubic root of 164725505 is about 548.1763345102.

The spelling of 164725505 in words is "one hundred sixty-four million, seven hundred twenty-five thousand, five hundred five".