164523425 has 24 divisors (see below), whose sum is σ = 225402240. Its totient is φ = 118123200.

The previous prime is 164523419. The next prime is 164523427. The reversal of 164523425 is 524325461.

It is a de Polignac number, because none of the positive numbers 2^k-164523425 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164523391 and 164523400.

It is not an unprimeable number, because it can be changed into a prime (164523427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17939 + ... + 25511.

It is an arithmetic number, because the mean of its divisors is an integer number (9391760).

Almost surely, 2^164523425 is an apocalyptic number.

It is an amenable number.

164523425 is a deficient number, since it is larger than the sum of its proper divisors (60878815).

164523425 is a wasteful number, since it uses less digits than its factorization.

164523425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673 (or 7668 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 164523425 is about 12826.6685074496. The cubic root of 164523425 is about 547.9520810302.

Adding to 164523425 its reverse (524325461), we get a palindrome (688848886).

The spelling of 164523425 in words is "one hundred sixty-four million, five hundred twenty-three thousand, four hundred twenty-five".