659561857919 has 8 divisors (see below), whose sum is σ = 670845621120. Its totient is φ = 648281586456.

The previous prime is 659561857907. The next prime is 659561857961. The reversal of 659561857919 is 919758165956.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-659561857919 is a prime.

It is a super-2 number, since 2×659561857919² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659561857979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490499 + ... + 1248884.

It is an arithmetic number, because the mean of its divisors is an integer number (83855702640).

Almost surely, 2^659561857919 is an apocalyptic number.

659561857919 is a deficient number, since it is larger than the sum of its proper divisors (11283763201).

659561857919 is a wasteful number, since it uses less digits than its factorization.

659561857919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745869.

The product of its digits is 183708000, while the sum is 71.

The spelling of 659561857919 in words is "six hundred fifty-nine billion, five hundred sixty-one million, eight hundred fifty-seven thousand, nine hundred nineteen".