164554213825 has 6 divisors (see below), whose sum is σ = 204047225174. Its totient is φ = 131643371040.

The previous prime is 164554213823. The next prime is 164554213841. The reversal of 164554213825 is 528312455461.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 69622336 + 164484591489 = 8344^2 + 405567^2 .

It is not a de Polignac number, because 164554213825 - 2¹ = 164554213823 is a prime.

It is a super-2 number, since 2×164554213825² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164554213823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3291084252 + ... + 3291084301.

Almost surely, 2^164554213825 is an apocalyptic number.

It is an amenable number.

164554213825 is a deficient number, since it is larger than the sum of its proper divisors (39493011349).

164554213825 is an equidigital number, since it uses as much as digits as its factorization.

164554213825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6582168563 (or 6582168558 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 46.

The spelling of 164554213825 in words is "one hundred sixty-four billion, five hundred fifty-four million, two hundred thirteen thousand, eight hundred twenty-five".