506689406459 has 4 divisors (see below), whose sum is σ = 506691616416. Its totient is φ = 506687196504.

The previous prime is 506689406389. The next prime is 506689406501. The reversal of 506689406459 is 954604986605.

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

It is a cyclic number.

It is not a de Polignac number, because 506689406459 - 2²⁸ = 506420971003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506689406359) 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, 715244 + ... + 1234889.

It is an arithmetic number, because the mean of its divisors is an integer number (126672904104).

Almost surely, 2^506689406459 is an apocalyptic number.

506689406459 is a deficient number, since it is larger than the sum of its proper divisors (2209957).

506689406459 is a wasteful number, since it uses less digits than its factorization.

506689406459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209956.

The product of its (nonzero) digits is 55987200, while the sum is 62.

The spelling of 506689406459 in words is "five hundred six billion, six hundred eighty-nine million, four hundred six thousand, four hundred fifty-nine".