26338452638 has 4 divisors (see below), whose sum is σ = 39507678960. Its totient is φ = 13169226318.

The previous prime is 26338452629. The next prime is 26338452649. The reversal of 26338452638 is 83625483362.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6584613158 + ... + 6584613161.

It is an arithmetic number, because the mean of its divisors is an integer number (9876919740).

Almost surely, 2^26338452638 is an apocalyptic number.

26338452638 is a deficient number, since it is larger than the sum of its proper divisors (13169226322).

26338452638 is a wasteful number, since it uses less digits than its factorization.

26338452638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13169226321.

The product of its digits is 4976640, while the sum is 50.

The spelling of 26338452638 in words is "twenty-six billion, three hundred thirty-eight million, four hundred fifty-two thousand, six hundred thirty-eight".