135231251544 has 96 divisors (see below), whose sum is σ = 386982807120. Its totient is φ = 44226539136.

The previous prime is 135231251531. The next prime is 135231251581. The reversal of 135231251544 is 445152132531.

135231251544 is a `hidden beast` number, since 1 + 3 + 52 + 3 + 12 + 51 + 544 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 135231251499 and 135231251508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 553227 + ... + 759290.

Almost surely, 2^135231251544 is an apocalyptic number.

It is an amenable number.

135231251544 is an abundant number, since it is smaller than the sum of its proper divisors (251751555576).

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

135231251544 is a wasteful number, since it uses less digits than its factorization.

135231251544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312591 (or 1312575 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 135231251544 in words is "one hundred thirty-five billion, two hundred thirty-one million, two hundred fifty-one thousand, five hundred forty-four".