133637831057 has 4 divisors (see below), whose sum is σ = 133826319540. Its totient is φ = 133449342576.

The previous prime is 133637831053. The next prime is 133637831069. The reversal of 133637831057 is 750138736331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750138736331 = 163 ⋅4602078137.

It can be written as a sum of positive squares in 2 ways, for example, as 15532886161 + 118104944896 = 124631^2 + 343664^2 .

It is a cyclic number.

It is not a de Polignac number, because 133637831057 - 2² = 133637831053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133637831053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94243178 + ... + 94244595.

It is an arithmetic number, because the mean of its divisors is an integer number (33456579885).

Almost surely, 2^133637831057 is an apocalyptic number.

It is an amenable number.

133637831057 is a deficient number, since it is larger than the sum of its proper divisors (188488483).

133637831057 is an equidigital number, since it uses as much as digits as its factorization.

133637831057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188488482.

The product of its (nonzero) digits is 952560, while the sum is 47.

The spelling of 133637831057 in words is "one hundred thirty-three billion, six hundred thirty-seven million, eight hundred thirty-one thousand, fifty-seven".