133561550808 has 64 divisors (see below), whose sum is σ = 424004928000. Its totient is φ = 38160442656.

The previous prime is 133561550797. The next prime is 133561550809. The reversal of 133561550808 is 808055165331.

133561550808 is a `hidden beast` number, since 1 + 3 + 3 + 561 + 5 + 5 + 0 + 80 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133561550809) 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, 44165668 + ... + 44168691.

It is an arithmetic number, because the mean of its divisors is an integer number (6625077000).

Almost surely, 2^133561550808 is an apocalyptic number.

133561550808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133561550808 is an abundant number, since it is smaller than the sum of its proper divisors (290443377192).

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

133561550808 is a wasteful number, since it uses less digits than its factorization.

133561550808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88334381 (or 88334371 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The spelling of 133561550808 in words is "one hundred thirty-three billion, five hundred sixty-one million, five hundred fifty thousand, eight hundred eight".