135220266240 has 72 divisors (see below), whose sum is σ = 431859737568. Its totient is φ = 36058736640.

The previous prime is 135220266239. The next prime is 135220266277. The reversal of 135220266240 is 42662022531.

It is a happy number.

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, 17602966 + ... + 17610645.

Almost surely, 2^135220266240 is an apocalyptic number.

135220266240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135220266240 is an abundant number, since it is smaller than the sum of its proper divisors (296639471328).

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

135220266240 is an equidigital number, since it uses as much as digits as its factorization.

135220266240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35213635 (or 35213621 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 135220266240 its reverse (42662022531), we get a palindrome (177882288771).

The spelling of 135220266240 in words is "one hundred thirty-five billion, two hundred twenty million, two hundred sixty-six thousand, two hundred forty".