135421423551 has 12 divisors (see below), whose sum is σ = 196622242128. Its totient is φ = 89813170944.

The previous prime is 135421423537. The next prime is 135421423573. The reversal of 135421423551 is 155324124531.

135421423551 is a `hidden beast` number, since 1 + 35 + 42 + 14 + 23 + 551 = 666.

It is not a de Polignac number, because 135421423551 - 2¹³ = 135421415359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135421423531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38979675 + ... + 38983148.

It is an arithmetic number, because the mean of its divisors is an integer number (16385186844).

Almost surely, 2^135421423551 is an apocalyptic number.

135421423551 is a deficient number, since it is larger than the sum of its proper divisors (61200818577).

135421423551 is a wasteful number, since it uses less digits than its factorization.

135421423551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77963022 (or 77963019 counting only the distinct ones).

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

The spelling of 135421423551 in words is "one hundred thirty-five billion, four hundred twenty-one million, four hundred twenty-three thousand, five hundred fifty-one".