4678639528493 has 12 divisors (see below), whose sum is σ = 5442793449660. Its totient is φ = 4010045522112.

The previous prime is 4678639528489. The next prime is 4678639528517. The reversal of 4678639528493 is 3948259368764.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 404174248009 + 4274465280484 = 635747^2 + 2067478^2 .

It is not a de Polignac number, because 4678639528493 - 2² = 4678639528489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4678639528493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4678639528403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1664138 + ... + 3482331.

It is an arithmetic number, because the mean of its divisors is an integer number (453566120805).

Almost surely, 2^{4678639528493} is an apocalyptic number.

It is an amenable number.

4678639528493 is a deficient number, since it is larger than the sum of its proper divisors (764153921167).

4678639528493 is a wasteful number, since it uses less digits than its factorization.

4678639528493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165036 (or 5165029 counting only the distinct ones).

The product of its digits is 1881169920, while the sum is 74.

The spelling of 4678639528493 in words is "four trillion, six hundred seventy-eight billion, six hundred thirty-nine million, five hundred twenty-eight thousand, four hundred ninety-three".