2638478529 has 20 divisors (see below), whose sum is σ = 4148877040. Its totient is φ = 1666406520.

The previous prime is 2638478519. The next prime is 2638478561. The reversal of 2638478529 is 9258748362.

It is not a de Polignac number, because 2638478529 - 2¹¹ = 2638476481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2638478509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 855667 + ... + 858744.

It is an arithmetic number, because the mean of its divisors is an integer number (207443852).

Almost surely, 2^2638478529 is an apocalyptic number.

It is an amenable number.

2638478529 is a deficient number, since it is larger than the sum of its proper divisors (1510398511).

2638478529 is a wasteful number, since it uses less digits than its factorization.

2638478529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714442 (or 1714433 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 2638478529 is about 51366.1223862577. The cubic root of 2638478529 is about 1381.8190897148.

The spelling of 2638478529 in words is "two billion, six hundred thirty-eight million, four hundred seventy-eight thousand, five hundred twenty-nine".