2638139529 has 8 divisors (see below), whose sum is σ = 3575183872. Its totient is φ = 1729927440.

The previous prime is 2638139527. The next prime is 2638139551. The reversal of 2638139529 is 9259318362.

2638139529 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2638139529 - 2¹ = 2638139527 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2638139527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7207849 + ... + 7208214.

It is an arithmetic number, because the mean of its divisors is an integer number (446897984).

Almost surely, 2^2638139529 is an apocalyptic number.

It is an amenable number.

2638139529 is a deficient number, since it is larger than the sum of its proper divisors (937044343).

2638139529 is a wasteful number, since it uses less digits than its factorization.

2638139529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14416127.

The product of its digits is 699840, while the sum is 48.

The square root of 2638139529 is about 51362.8224399711. The cubic root of 2638139529 is about 1381.7599070293.

The spelling of 2638139529 in words is "two billion, six hundred thirty-eight million, one hundred thirty-nine thousand, five hundred twenty-nine".