659493394957 has 4 divisors (see below), whose sum is σ = 659511325116. Its totient is φ = 659475464800.

The previous prime is 659493394949. The next prime is 659493394961. The reversal of 659493394957 is 759493394956.

659493394957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 567108400356 + 92384994601 = 753066^2 + 303949^2 .

It is a cyclic number.

It is not a de Polignac number, because 659493394957 - 2³ = 659493394949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 659493394957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659493394997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8909794 + ... + 8983507.

It is an arithmetic number, because the mean of its divisors is an integer number (164877831279).

Almost surely, 2^659493394957 is an apocalyptic number.

It is an amenable number.

659493394957 is a deficient number, since it is larger than the sum of its proper divisors (17930159).

659493394957 is a wasteful number, since it uses less digits than its factorization.

659493394957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17930158.

The product of its digits is 992023200, while the sum is 73.

Subtracting 659493394957 from its reverse (759493394956), we obtain a palindrome (99999999999).

The spelling of 659493394957 in words is "six hundred fifty-nine billion, four hundred ninety-three million, three hundred ninety-four thousand, nine hundred fifty-seven".