26421541540 has 12 divisors (see below), whose sum is σ = 55485237276. Its totient is φ = 10568616608.

The previous prime is 26421541513. The next prime is 26421541543. The reversal of 26421541540 is 4514512462.

It can be written as a sum of positive squares in 2 ways, for example, as 17616721984 + 8804819556 = 132728^2 + 93834^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26421541496 and 26421541505.

It is not an unprimeable number, because it can be changed into a prime (26421541543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 660538519 + ... + 660538558.

It is an arithmetic number, because the mean of its divisors is an integer number (4623769773).

Almost surely, 2^26421541540 is an apocalyptic number.

26421541540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26421541540 is an abundant number, since it is smaller than the sum of its proper divisors (29063695736).

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

26421541540 is a wasteful number, since it uses less digits than its factorization.

26421541540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321077086 (or 1321077084 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 26421541540 in words is "twenty-six billion, four hundred twenty-one million, five hundred forty-one thousand, five hundred forty".