168504585425 has 12 divisors (see below), whose sum is σ = 227940748656. Its totient is φ = 122548789200.

The previous prime is 168504585413. The next prime is 168504585443. The reversal of 168504585425 is 524585405861.

It is a happy number.

It is not a de Polignac number, because 168504585425 - 2¹⁶ = 168504519889 is a prime.

It is a super-2 number, since 2×168504585425² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306371699 + ... + 306372248.

It is an arithmetic number, because the mean of its divisors is an integer number (18995062388).

Almost surely, 2^168504585425 is an apocalyptic number.

It is an amenable number.

168504585425 is a deficient number, since it is larger than the sum of its proper divisors (59436163231).

168504585425 is a wasteful number, since it uses less digits than its factorization.

168504585425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612743968 (or 612743963 counting only the distinct ones).

The product of its (nonzero) digits is 7680000, while the sum is 53.

The spelling of 168504585425 in words is "one hundred sixty-eight billion, five hundred four million, five hundred eighty-five thousand, four hundred twenty-five".