133408389555 has 240 divisors, whose sum is σ = 292736268000. Its totient is φ = 57870941184.

The previous prime is 133408389529. The next prime is 133408389577. The reversal of 133408389555 is 555983804331.

133408389555 is a `hidden beast` number, since 1 + 3 + 3 + 4 + 0 + 8 + 3 + 89 + 555 = 666.

It is not a de Polignac number, because 133408389555 - 2²⁵ = 133374835123 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 33952831 + ... + 33956759.

It is an arithmetic number, because the mean of its divisors is an integer number (1219734450).

Almost surely, 2^133408389555 is an apocalyptic number.

133408389555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133408389555 is an abundant number, since it is smaller than the sum of its proper divisors (159327878445).

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

133408389555 is a wasteful number, since it uses less digits than its factorization.

133408389555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048 (or 4032 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 133408389555 in words is "one hundred thirty-three billion, four hundred eight million, three hundred eighty-nine thousand, five hundred fifty-five".