133565356660 has 48 divisors (see below), whose sum is σ = 296691768576. Its totient is φ = 50403209472.

The previous prime is 133565356649. The next prime is 133565356669. The reversal of 133565356660 is 66653565331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133565356669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955184 + ... + 2022343.

It is an arithmetic number, because the mean of its divisors is an integer number (6181078512).

Almost surely, 2^133565356660 is an apocalyptic number.

133565356660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133565356660 is an abundant number, since it is smaller than the sum of its proper divisors (163126411916).

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

133565356660 is a wasteful number, since it uses less digits than its factorization.

133565356660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977632 (or 3977630 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 49.

The spelling of 133565356660 in words is "one hundred thirty-three billion, five hundred sixty-five million, three hundred fifty-six thousand, six hundred sixty".