135440542234420 has 48 divisors (see below), whose sum is σ = 284755534635600. Its totient is φ = 54113294274560.

The previous prime is 135440542234379. The next prime is 135440542234433. The reversal of 135440542234420 is 24432245044531.

It can be written as a sum of positive squares in 8 ways, for example, as 2173743307044 + 133266798927376 = 1474362^2 + 11544124^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222302766 + ... + 222911194.

It is an arithmetic number, because the mean of its divisors is an integer number (5932406971575).

Almost surely, 2^{135440542234420} is an apocalyptic number.

135440542234420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135440542234420 is an abundant number, since it is smaller than the sum of its proper divisors (149314992401180).

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

135440542234420 is a wasteful number, since it uses less digits than its factorization.

135440542234420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621348 (or 621346 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 43.

Adding to 135440542234420 its reverse (24432245044531), we get a palindrome (159872787278951).

The spelling of 135440542234420 in words is "one hundred thirty-five trillion, four hundred forty billion, five hundred forty-two million, two hundred thirty-four thousand, four hundred twenty".