26638815028 has 12 divisors (see below), whose sum is σ = 53277630112. Its totient is φ = 11416635000.

The previous prime is 26638815011. The next prime is 26638815037. The reversal of 26638815028 is 82051883662.

26638815028 is an admirable number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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 in 3 ways as a sum of consecutive naturals, for example, 475693098 + ... + 475693153.

Almost surely, 2^26638815028 is an apocalyptic number.

26638815028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

26638815028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

26638815028 is a wasteful number, since it uses less digits than its factorization.

26638815028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951386262 (or 951386260 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 26638815028 in words is "twenty-six billion, six hundred thirty-eight million, eight hundred fifteen thousand, twenty-eight".