133855956432 has 400 divisors, whose sum is σ = 431244487872. Its totient is φ = 39743447040.

The previous prime is 133855956389. The next prime is 133855956463. The reversal of 133855956432 is 234659558331.

133855956432 is a `hidden beast` number, since 1 + 3 + 3 + 8 + 5 + 595 + 6 + 43 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 337168458 + ... + 337168854.

Almost surely, 2^133855956432 is an apocalyptic number.

133855956432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133855956432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215622243936).

133855956432 is an abundant number, since it is smaller than the sum of its proper divisors (297388531440).

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

133855956432 is a wasteful number, since it uses less digits than its factorization.

133855956432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 833 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 54.

The spelling of 133855956432 in words is "one hundred thirty-three billion, eight hundred fifty-five million, nine hundred fifty-six thousand, four hundred thirty-two".