133713048781 has 4 divisors (see below), whose sum is σ = 143998667932. Its totient is φ = 123427429632.

The previous prime is 133713048779. The next prime is 133713048809. The reversal of 133713048781 is 187840317331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187840317331 = 1471 ⋅127695661.

It can be written as a sum of positive squares in 2 ways, for example, as 81715367881 + 51997680900 = 285859^2 + 228030^2 .

It is not a de Polignac number, because 133713048781 - 2¹ = 133713048779 is a prime.

It is a super-2 number, since 2×133713048781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133713048751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5142809556 + ... + 5142809581.

It is an arithmetic number, because the mean of its divisors is an integer number (35999666983).

Almost surely, 2^133713048781 is an apocalyptic number.

It is an amenable number.

133713048781 is a deficient number, since it is larger than the sum of its proper divisors (10285619151).

133713048781 is a wasteful number, since it uses less digits than its factorization.

133713048781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10285619150.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 133713048781 in words is "one hundred thirty-three billion, seven hundred thirteen million, forty-eight thousand, seven hundred eighty-one".