135547421481 has 24 divisors (see below), whose sum is σ = 198792944064. Its totient is φ = 88980392160.

The previous prime is 135547421479. The next prime is 135547421491. The reversal of 135547421481 is 184124745531.

135547421481 is a `hidden beast` number, since 1 + 3 + 5 + 547 + 4 + 21 + 4 + 81 = 666.

It is not a de Polignac number, because 135547421481 - 2¹ = 135547421479 is a prime.

It is a super-2 number, since 2×135547421481² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (135547421431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1497916 + ... + 1585826.

It is an arithmetic number, because the mean of its divisors is an integer number (8283039336).

Almost surely, 2^135547421481 is an apocalyptic number.

It is an amenable number.

135547421481 is a deficient number, since it is larger than the sum of its proper divisors (63245522583).

135547421481 is a wasteful number, since it uses less digits than its factorization.

135547421481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90541 (or 90538 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The spelling of 135547421481 in words is "one hundred thirty-five billion, five hundred forty-seven million, four hundred twenty-one thousand, four hundred eighty-one".