659645645631 has 8 divisors (see below), whose sum is σ = 1005174317184. Its totient is φ = 376940368920.

The previous prime is 659645645609. The next prime is 659645645669. The reversal of 659645645631 is 136546546956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 659645645631 - 2²¹ = 659643548479 is a prime.

It is a super-2 number, since 2×659645645631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659645645531) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15705848685 + ... + 15705848726.

It is an arithmetic number, because the mean of its divisors is an integer number (125646789648).

Almost surely, 2^659645645631 is an apocalyptic number.

659645645631 is a deficient number, since it is larger than the sum of its proper divisors (345528671553).

659645645631 is a wasteful number, since it uses less digits than its factorization.

659645645631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31411697421.

The product of its digits is 69984000, while the sum is 60.

The spelling of 659645645631 in words is "six hundred fifty-nine billion, six hundred forty-five million, six hundred forty-five thousand, six hundred thirty-one".