133735482781 has 4 divisors (see below), whose sum is σ = 133743215772. Its totient is φ = 133727749792.

The previous prime is 133735482773. The next prime is 133735482847. The reversal of 133735482781 is 187284537331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187284537331 = 677 ⋅276638903.

It can be written as a sum of positive squares in 2 ways, for example, as 23040204100 + 110695278681 = 151790^2 + 332709^2 .

It is a cyclic number.

It is not a de Polignac number, because 133735482781 - 2³ = 133735482773 is a prime.

It is a super-2 number, since 2×133735482781² (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 (133735483781) 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, 3840496 + ... + 3875161.

It is an arithmetic number, because the mean of its divisors is an integer number (33435803943).

Almost surely, 2^133735482781 is an apocalyptic number.

It is an amenable number.

133735482781 is a deficient number, since it is larger than the sum of its proper divisors (7732991).

133735482781 is an equidigital number, since it uses as much as digits as its factorization.

133735482781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7732990.

The product of its digits is 3386880, while the sum is 52.

The spelling of 133735482781 in words is "one hundred thirty-three billion, seven hundred thirty-five million, four hundred eighty-two thousand, seven hundred eighty-one".