164442533425 has 6 divisors (see below), whose sum is σ = 203908741478. Its totient is φ = 131554026720.

The previous prime is 164442533419. The next prime is 164442533461. The reversal of 164442533425 is 524335244461.

It can be written as a sum of positive squares in 3 ways, for example, as 27652031521 + 136790501904 = 166289^2 + 369852^2 .

It is not a de Polignac number, because 164442533425 - 2⁵ = 164442533393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3288850644 + ... + 3288850693.

Almost surely, 2^164442533425 is an apocalyptic number.

It is an amenable number.

164442533425 is a deficient number, since it is larger than the sum of its proper divisors (39466208053).

164442533425 is an equidigital number, since it uses as much as digits as its factorization.

164442533425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6577701347 (or 6577701342 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 43.

Adding to 164442533425 its reverse (524335244461), we get a palindrome (688777777886).

The spelling of 164442533425 in words is "one hundred sixty-four billion, four hundred forty-two million, five hundred thirty-three thousand, four hundred twenty-five".