133869385536 has 56 divisors (see below), whose sum is σ = 358679617920. Its totient is φ = 44058273792.

The previous prime is 133869385501. The next prime is 133869385547. The reversal of 133869385536 is 635583968331.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 133869385536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4397721 + ... + 4428056.

Almost surely, 2^133869385536 is an apocalyptic number.

133869385536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133869385536 is an abundant number, since it is smaller than the sum of its proper divisors (224810232384).

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

133869385536 is an equidigital number, since it uses as much as digits as its factorization.

133869385536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825871 (or 8825861 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 60.

The spelling of 133869385536 in words is "one hundred thirty-three billion, eight hundred sixty-nine million, three hundred eighty-five thousand, five hundred thirty-six".