493328681509 has 4 divisors (see below), whose sum is σ = 493647165100. Its totient is φ = 493010197920.

The previous prime is 493328681501. The next prime is 493328681539. The reversal of 493328681509 is 905186823394.

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 153940876609 + 339387804900 = 392353^2 + 582570^2 .

It is a cyclic number.

It is not a de Polignac number, because 493328681509 - 2³ = 493328681501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493328681501) 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, 159239472 + ... + 159242569.

It is an arithmetic number, because the mean of its divisors is an integer number (123411791275).

Almost surely, 2^493328681509 is an apocalyptic number.

It is an amenable number.

493328681509 is a deficient number, since it is larger than the sum of its proper divisors (318483591).

493328681509 is a wasteful number, since it uses less digits than its factorization.

493328681509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318483590.

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 493328681509 in words is "four hundred ninety-three billion, three hundred twenty-eight million, six hundred eighty-one thousand, five hundred nine".