133575448391 has 24 divisors (see below), whose sum is σ = 170361417600. Its totient is φ = 103561642800.

The previous prime is 133575448337. The next prime is 133575448397. The reversal of 133575448391 is 193844575331.

It is not a de Polignac number, because 133575448391 - 2²² = 133571254087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133575448397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 515405 + ... + 729926.

It is an arithmetic number, because the mean of its divisors is an integer number (7098392400).

Almost surely, 2^133575448391 is an apocalyptic number.

133575448391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133575448391 is a deficient number, since it is larger than the sum of its proper divisors (36785969209).

133575448391 is a wasteful number, since it uses less digits than its factorization.

133575448391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245555 (or 1245548 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 53.

The spelling of 133575448391 in words is "one hundred thirty-three billion, five hundred seventy-five million, four hundred forty-eight thousand, three hundred ninety-one".