26981489960 has 32 divisors (see below), whose sum is σ = 60996088800. Its totient is φ = 10741442880.

The previous prime is 26981489947. The next prime is 26981489989. The reversal of 26981489960 is 6998418962.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 26981489893 and 26981489902.

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, 1589990 + ... + 1606869.

It is an arithmetic number, because the mean of its divisors is an integer number (1906127775).

Almost surely, 2^26981489960 is an apocalyptic number.

26981489960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26981489960 is an abundant number, since it is smaller than the sum of its proper divisors (34014598840).

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

26981489960 is a wasteful number, since it uses less digits than its factorization.

26981489960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197081 (or 3197077 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 62.

The spelling of 26981489960 in words is "twenty-six billion, nine hundred eighty-one million, four hundred eighty-nine thousand, nine hundred sixty".