133839261257 has 8 divisors (see below), whose sum is σ = 152613094536. Its totient is φ = 116276643072.

The previous prime is 133839261239. The next prime is 133839261313. The reversal of 133839261257 is 752162938331.

It can be written as a sum of positive squares in 4 ways, for example, as 23280351241 + 110558910016 = 152579^2 + 332504^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133839261257 - 2⁸ = 133839261001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133839231257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302803538 + ... + 302803979.

It is an arithmetic number, because the mean of its divisors is an integer number (19076636817).

Almost surely, 2^133839261257 is an apocalyptic number.

133839261257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

133839261257 is a deficient number, since it is larger than the sum of its proper divisors (18773833279).

133839261257 is a wasteful number, since it uses less digits than its factorization.

133839261257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605607547.

The product of its digits is 1632960, while the sum is 50.

The spelling of 133839261257 in words is "one hundred thirty-three billion, eight hundred thirty-nine million, two hundred sixty-one thousand, two hundred fifty-seven".