135255421301440 has 56 divisors (see below), whose sum is σ = 351356696708112. Its totient is φ = 49183789562880.

The previous prime is 135255421301437. The next prime is 135255421301573. The reversal of 135255421301440 is 44103124552531.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 135255421301393 and 135255421301402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19212414279 + ... + 19212421318.

Almost surely, 2^{135255421301440} is an apocalyptic number.

135255421301440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135255421301440 is an abundant number, since it is smaller than the sum of its proper divisors (216101275406672).

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

135255421301440 is a wasteful number, since it uses less digits than its factorization.

135255421301440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38424835625 (or 38424835615 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 135255421301440 its reverse (44103124552531), we get a palindrome (179358545853971).

The spelling of 135255421301440 in words is "one hundred thirty-five trillion, two hundred fifty-five billion, four hundred twenty-one million, three hundred one thousand, four hundred forty".