133863535381 has 4 divisors (see below), whose sum is σ = 133870383712. Its totient is φ = 133856687052.

The previous prime is 133863535373. The next prime is 133863535417. The reversal of 133863535381 is 183535368331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183535368331 = 7 ⋅26219338333.

It is a cyclic number.

It is not a de Polignac number, because 133863535381 - 2³ = 133863535373 is a prime.

It is a super-3 number, since 3×133863535381³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133864535381) 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, 3394761 + ... + 3433966.

It is an arithmetic number, because the mean of its divisors is an integer number (33467595928).

Almost surely, 2^133863535381 is an apocalyptic number.

It is an amenable number.

133863535381 is a deficient number, since it is larger than the sum of its proper divisors (6848331).

133863535381 is an equidigital number, since it uses as much as digits as its factorization.

133863535381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6848330.

The product of its digits is 2332800, while the sum is 49.

The spelling of 133863535381 in words is "one hundred thirty-three billion, eight hundred sixty-three million, five hundred thirty-five thousand, three hundred eighty-one".