26638623426 has 16 divisors (see below), whose sum is σ = 53279005824. Its totient is φ = 8879247984.

The previous prime is 26638623419. The next prime is 26638623439. The reversal of 26638623426 is 62432683662.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204696 + ... + 308508.

It is an arithmetic number, because the mean of its divisors is an integer number (3329937864).

Almost surely, 2^26638623426 is an apocalyptic number.

26638623426 is an abundant number, since it is smaller than the sum of its proper divisors (26640382398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26638623426 is a wasteful number, since it uses less digits than its factorization.

26638623426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146585.

The product of its digits is 2985984, while the sum is 48.

The spelling of 26638623426 in words is "twenty-six billion, six hundred thirty-eight million, six hundred twenty-three thousand, four hundred twenty-six".