26987044660 has 24 divisors (see below), whose sum is σ = 56676168360. Its totient is φ = 10794175104.

The previous prime is 26987044603. The next prime is 26987044741. The reversal of 26987044660 is 6644078962.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1949045904 + 25037998756 = 44148^2 + 158234^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26987044598 and 26987044607.

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 7 ways as a sum of consecutive naturals, for example, 449962 + ... + 506398.

It is an arithmetic number, because the mean of its divisors is an integer number (2361507015).

Almost surely, 2^26987044660 is an apocalyptic number.

26987044660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26987044660 is an abundant number, since it is smaller than the sum of its proper divisors (29689123700).

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

26987044660 is a wasteful number, since it uses less digits than its factorization.

26987044660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80355 (or 80353 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 26987044660 in words is "twenty-six billion, nine hundred eighty-seven million, forty-four thousand, six hundred sixty".