26655663540 has 288 divisors, whose sum is σ = 86932460160. Its totient is φ = 6081039360.

The previous prime is 26655663449. The next prime is 26655663569. The reversal of 26655663540 is 4536655662.

It is a self number, because there is not a number n which added to its sum of digits gives 26655663540.

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 95 ways as a sum of consecutive naturals, for example, 23863062 + ... + 23864178.

It is an arithmetic number, because the mean of its divisors is an integer number (301848820).

Almost surely, 2^26655663540 is an apocalyptic number.

26655663540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26655663540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43466230080).

26655663540 is an abundant number, since it is smaller than the sum of its proper divisors (60276796620).

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

26655663540 is a wasteful number, since it uses less digits than its factorization.

26655663540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 26655663540 in words is "twenty-six billion, six hundred fifty-five million, six hundred sixty-three thousand, five hundred forty".