659645645505 has 96 divisors (see below), whose sum is σ = 1338962897664. Its totient is φ = 271423680000.

The previous prime is 659645645489. The next prime is 659645645513. The reversal of 659645645505 is 505546546956.

It is not a de Polignac number, because 659645645505 - 2⁴ = 659645645489 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1026175 + ... + 1540235.

It is an arithmetic number, because the mean of its divisors is an integer number (13947530184).

Almost surely, 2^659645645505 is an apocalyptic number.

It is an amenable number.

659645645505 is an abundant number, since it is smaller than the sum of its proper divisors (679317252159).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

659645645505 is a wasteful number, since it uses less digits than its factorization.

659645645505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514199 (or 514188 counting only the distinct ones).

The product of its (nonzero) digits is 97200000, while the sum is 60.

The spelling of 659645645505 in words is "six hundred fifty-nine billion, six hundred forty-five million, six hundred forty-five thousand, five hundred five".