164540425 has 24 divisors (see below), whose sum is σ = 234913536. Its totient is φ = 111987840.

The previous prime is 164540419. The next prime is 164540449. The reversal of 164540425 is 524045461.

It is a happy number.

It is not a de Polignac number, because 164540425 - 2¹¹ = 164538377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20544 + ... + 27406.

It is an arithmetic number, because the mean of its divisors is an integer number (9788064).

Almost surely, 2^164540425 is an apocalyptic number.

It is an amenable number.

164540425 is a deficient number, since it is larger than the sum of its proper divisors (70373111).

164540425 is a wasteful number, since it uses less digits than its factorization.

164540425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7017 (or 7012 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 164540425 is about 12827.3311721496. The cubic root of 164540425 is about 547.9709534483.

Adding to 164540425 its reverse (524045461), we get a palindrome (688585886).

The spelling of 164540425 in words is "one hundred sixty-four million, five hundred forty thousand, four hundred twenty-five".