135512354549978 has 48 divisors (see below), whose sum is σ = 236886371820000. Its totient is φ = 57970913626080.

The previous prime is 135512354549969. The next prime is 135512354549981. The reversal of 135512354549978 is 879945453215531.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134531348 + ... + 135534896.

It is an arithmetic number, because the mean of its divisors is an integer number (4935132746250).

Almost surely, 2^{135512354549978} is an apocalyptic number.

135512354549978 is a deficient number, since it is larger than the sum of its proper divisors (101374017270022).

135512354549978 is a wasteful number, since it uses less digits than its factorization.

135512354549978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006075 (or 1006068 counting only the distinct ones).

The product of its digits is 816480000, while the sum is 71.

The spelling of 135512354549978 in words is "one hundred thirty-five trillion, five hundred twelve billion, three hundred fifty-four million, five hundred forty-nine thousand, nine hundred seventy-eight".