659643580357 has 2 divisors, whose sum is σ = 659643580358. Its totient is φ = 659643580356.

The previous prime is 659643580313. The next prime is 659643580499. The reversal of 659643580357 is 753085346956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558418431076 + 101225149281 = 747274^2 + 318159^2 .

It is a cyclic number.

It is not a de Polignac number, because 659643580357 - 2¹¹ = 659643578309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 659643580295 and 659643580304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (659643580957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329821790178 + 329821790179.

It is an arithmetic number, because the mean of its divisors is an integer number (329821790179).

Almost surely, 2^659643580357 is an apocalyptic number.

It is an amenable number.

659643580357 is a deficient number, since it is larger than the sum of its proper divisors (1).

659643580357 is an equidigital number, since it uses as much as digits as its factorization.

659643580357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648000, while the sum is 61.

The spelling of 659643580357 in words is "six hundred fifty-nine billion, six hundred forty-three million, five hundred eighty thousand, three hundred fifty-seven".