26550551540 has 48 divisors (see below), whose sum is σ = 57739651200. Its totient is φ = 10243185792.

The previous prime is 26550551537. The next prime is 26550551557. The reversal of 26550551540 is 4515505562.

It is a junction number, because it is equal to n+sod(n) for n = 26550551494 and 26550551503.

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 15 ways as a sum of consecutive naturals, for example, 537191 + ... + 584529.

It is an arithmetic number, because the mean of its divisors is an integer number (1202909400).

Almost surely, 2^26550551540 is an apocalyptic number.

26550551540 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 26550551540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28869825600).

26550551540 is an abundant number, since it is smaller than the sum of its proper divisors (31189099660).

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

26550551540 is a wasteful number, since it uses less digits than its factorization.

26550551540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48344 (or 48342 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 26550551540 in words is "twenty-six billion, five hundred fifty million, five hundred fifty-one thousand, five hundred forty".