26921784868 has 48 divisors (see below), whose sum is σ = 54918864000. Its totient is φ = 11411642880.

The previous prime is 26921784839. The next prime is 26921784871. The reversal of 26921784868 is 86848712962.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83568 + ... + 246631.

It is an arithmetic number, because the mean of its divisors is an integer number (1144143000).

Almost surely, 2^26921784868 is an apocalyptic number.

It is an amenable number.

26921784868 is an abundant number, since it is smaller than the sum of its proper divisors (27997079132).

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

26921784868 is a wasteful number, since it uses less digits than its factorization.

26921784868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330340 (or 330338 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 61.

The spelling of 26921784868 in words is "twenty-six billion, nine hundred twenty-one million, seven hundred eighty-four thousand, eight hundred sixty-eight".