135678215508 has 48 divisors (see below), whose sum is σ = 345571713984. Its totient is φ = 41089731840.

The previous prime is 135678215473. The next prime is 135678215537. The reversal of 135678215508 is 805512876531.

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 15 ways as a sum of consecutive naturals, for example, 91435 + ... + 528882.

It is an arithmetic number, because the mean of its divisors is an integer number (7199410708).

Almost surely, 2^135678215508 is an apocalyptic number.

It is an amenable number.

135678215508 is an abundant number, since it is smaller than the sum of its proper divisors (209893498476).

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

135678215508 is a wasteful number, since it uses less digits than its factorization.

135678215508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621992 (or 621990 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 51.

The spelling of 135678215508 in words is "one hundred thirty-five billion, six hundred seventy-eight million, two hundred fifteen thousand, five hundred eight".