164006425 has 18 divisors (see below), whose sum is σ = 223540814. Its totient is φ = 119275200.

The previous prime is 164006413. The next prime is 164006431. The reversal of 164006425 is 524600461.

It can be written as a sum of positive squares in 3 ways, for example, as 64009 + 163942416 = 253^2 + 12804^2 .

It is not a de Polignac number, because 164006425 - 2¹⁷ = 163875353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164006393 and 164006402.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24084 + ... + 30133.

Almost surely, 2^164006425 is an apocalyptic number.

It is an amenable number.

164006425 is a deficient number, since it is larger than the sum of its proper divisors (59534389).

164006425 is a wasteful number, since it uses less digits than its factorization.

164006425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54249 (or 54233 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 164006425 is about 12806.4993265139. The cubic root of 164006425 is about 547.3775154650.

Adding to 164006425 its reverse (524600461), we get a palindrome (688606886).

The spelling of 164006425 in words is "one hundred sixty-four million, six thousand, four hundred twenty-five".