133438261555 has 8 divisors (see below), whose sum is σ = 163849772592. Its totient is φ = 104268036768.

The previous prime is 133438261553. The next prime is 133438261577. The reversal of 133438261555 is 555162834331.

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 133438261555 - 2¹ = 133438261553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133438261553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310321324 + ... + 310321753.

It is an arithmetic number, because the mean of its divisors is an integer number (20481221574).

Almost surely, 2^133438261555 is an apocalyptic number.

133438261555 is a deficient number, since it is larger than the sum of its proper divisors (30411511037).

133438261555 is an equidigital number, since it uses as much as digits as its factorization.

133438261555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620643125.

The product of its digits is 1296000, while the sum is 46.

The spelling of 133438261555 in words is "one hundred thirty-three billion, four hundred thirty-eight million, two hundred sixty-one thousand, five hundred fifty-five".