133731537768 has 48 divisors (see below), whose sum is σ = 365394821220. Its totient is φ = 44182688256.

The previous prime is 133731537691. The next prime is 133731537769. The reversal of 133731537768 is 867735137331.

It is a happy number.

133731537768 is a `hidden beast` number, since 1 + 3 + 3 + 7 + 31 + 537 + 76 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 102798466884 + 30933070884 = 320622^2 + 175878^2 .

It is not an unprimeable number, because it can be changed into a prime (133731537769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8210371 + ... + 8226642.

Almost surely, 2^133731537768 is an apocalyptic number.

133731537768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

133731537768 is an abundant number, since it is smaller than the sum of its proper divisors (231663283452).

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

133731537768 is a wasteful number, since it uses less digits than its factorization.

133731537768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16437138 (or 16437131 counting only the distinct ones).

The product of its digits is 6667920, while the sum is 54.

The spelling of 133731537768 in words is "one hundred thirty-three billion, seven hundred thirty-one million, five hundred thirty-seven thousand, seven hundred sixty-eight".