164240204025 has 24 divisors (see below), whose sum is σ = 271593306400. Its totient is φ = 87578807040.

The previous prime is 164240203991. The next prime is 164240204027. The reversal of 164240204025 is 520402042461.

It is not a de Polignac number, because 164240204025 - 2¹⁴ = 164240187641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164240203983 and 164240204001.

It is not an unprimeable number, because it can be changed into a prime (164240204027) 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, 220401 + ... + 614049.

Almost surely, 2^164240204025 is an apocalyptic number.

164240204025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164240204025 is a deficient number, since it is larger than the sum of its proper divisors (107353102375).

164240204025 is a wasteful number, since it uses less digits than its factorization.

164240204025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399225 (or 399220 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 164240204025 its reverse (520402042461), we get a palindrome (684642246486).

The spelling of 164240204025 in words is "one hundred sixty-four billion, two hundred forty million, two hundred four thousand, twenty-five".