135208545989 has 12 divisors (see below), whose sum is σ = 150042651360. Its totient is φ = 120833489160.

The previous prime is 135208545971. The next prime is 135208546021. The reversal of 135208545989 is 989545802531.

It is not a de Polignac number, because 135208545989 - 2²⁴ = 135191768773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135208545919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1727249 + ... + 1803830.

It is an arithmetic number, because the mean of its divisors is an integer number (12503554280).

Almost surely, 2^135208545989 is an apocalyptic number.

It is an amenable number.

135208545989 is a deficient number, since it is larger than the sum of its proper divisors (14834105371).

135208545989 is an equidigital number, since it uses as much as digits as its factorization.

135208545989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531208 (or 3531149 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 59.

The spelling of 135208545989 in words is "one hundred thirty-five billion, two hundred eight million, five hundred forty-five thousand, nine hundred eighty-nine".