163511145664625 has 128 divisors (see below), whose sum is σ = 224867262896640. Its totient is φ = 117720317952000.

The previous prime is 163511145664621. The next prime is 163511145664627. The reversal of 163511145664625 is 526466541115361.

It is not a de Polignac number, because 163511145664625 - 2² = 163511145664621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163511145664621) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 91398068231 + ... + 91398070019.

It is an arithmetic number, because the mean of its divisors is an integer number (1756775491380).

Almost surely, 2^{163511145664625} is an apocalyptic number.

It is an amenable number.

163511145664625 is a deficient number, since it is larger than the sum of its proper divisors (61356117232015).

163511145664625 is a wasteful number, since it uses less digits than its factorization.

163511145664625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3508 (or 3498 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 56.

Adding to 163511145664625 its reverse (526466541115361), we get a palindrome (689977686779986).

The spelling of 163511145664625 in words is "one hundred sixty-three trillion, five hundred eleven billion, one hundred forty-five million, six hundred sixty-four thousand, six hundred twenty-five".