135208546020 has 72 divisors (see below), whose sum is σ = 410766842304. Its totient is φ = 35999853888.

The previous prime is 135208545971. The next prime is 135208546021. The reversal of 135208546020 is 20645802531.

135208546020 is a `hidden beast` number, since 1 + 3 + 520 + 8 + 54 + 60 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (135208546021) 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 23 ways as a sum of consecutive naturals, for example, 464034 + ... + 696953.

It is an arithmetic number, because the mean of its divisors is an integer number (5705095032).

Almost surely, 2^135208546020 is an apocalyptic number.

135208546020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135208546020 is an abundant number, since it is smaller than the sum of its proper divisors (275558296284).

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

135208546020 is a wasteful number, since it uses less digits than its factorization.

135208546020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161649 (or 1161644 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 135208546020 in words is "one hundred thirty-five billion, two hundred eight million, five hundred forty-six thousand, twenty".