164261542316525 has 24 divisors (see below), whose sum is σ = 215451661133760. Its totient is φ = 123973928749440.

The previous prime is 164261542316519. The next prime is 164261542316563. The reversal of 164261542316525 is 525613245162461.

It is a happy number.

It is not a de Polignac number, because 164261542316525 - 2¹⁰ = 164261542315501 is a prime.

It is a congruent 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, 1956617255 + ... + 1956701204.

It is an arithmetic number, because the mean of its divisors is an integer number (8977152547240).

Almost surely, 2^{164261542316525} is an apocalyptic number.

It is an amenable number.

164261542316525 is a deficient number, since it is larger than the sum of its proper divisors (51190118817235).

164261542316525 is a wasteful number, since it uses less digits than its factorization.

164261542316525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913318565 (or 3913318560 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 53.

Adding to 164261542316525 its reverse (525613245162461), we get a palindrome (689874787478986).

The spelling of 164261542316525 in words is "one hundred sixty-four trillion, two hundred sixty-one billion, five hundred forty-two million, three hundred sixteen thousand, five hundred twenty-five".