135566712920 has 32 divisors (see below), whose sum is σ = 305040474720. Its totient is φ = 54223952640.

The previous prime is 135566712917. The next prime is 135566712929. The reversal of 135566712920 is 29217665531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135566712929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842909 + ... + 990771.

It is an arithmetic number, because the mean of its divisors is an integer number (9532514835).

Almost surely, 2^135566712920 is an apocalyptic number.

135566712920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135566712920 is an abundant number, since it is smaller than the sum of its proper divisors (169473761800).

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

135566712920 is a wasteful number, since it uses less digits than its factorization.

135566712920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170795 (or 170791 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 135566712920 in words is "one hundred thirty-five billion, five hundred sixty-six million, seven hundred twelve thousand, nine hundred twenty".