682645438509 has 16 divisors (see below), whose sum is σ = 914367085632. Its totient is φ = 453014004608.

The previous prime is 682645438487. The next prime is 682645438513. The reversal of 682645438509 is 905834546286.

It is a happy number.

682645438509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 682645438509 - 2¹⁷ = 682645307437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682645438609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300202 + ... + 1206404.

It is an arithmetic number, because the mean of its divisors is an integer number (57147942852).

Almost surely, 2^682645438509 is an apocalyptic number.

It is an amenable number.

682645438509 is a deficient number, since it is larger than the sum of its proper divisors (231721647123).

682645438509 is a wasteful number, since it uses less digits than its factorization.

682645438509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907356.

The product of its (nonzero) digits is 49766400, while the sum is 60.

The spelling of 682645438509 in words is "six hundred eighty-two billion, six hundred forty-five million, four hundred thirty-eight thousand, five hundred nine".