133464543645521 has 24 divisors (see below), whose sum is σ = 153177653482560. Its totient is φ = 116052724467680.

The previous prime is 133464543645487. The next prime is 133464543645547. The reversal of 133464543645521 is 125546345464331.

It is a de Polignac number, because none of the positive numbers 2^k-133464543645521 is a prime.

It is a super-2 number, since 2×133464543645521² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133464543645721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177357821 + ... + 178108746.

It is an arithmetic number, because the mean of its divisors is an integer number (6382402228440).

Almost surely, 2^{133464543645521} is an apocalyptic number.

133464543645521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133464543645521 is a deficient number, since it is larger than the sum of its proper divisors (19713109837039).

133464543645521 is a wasteful number, since it uses less digits than its factorization.

133464543645521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355466725 (or 355466714 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 56.

The spelling of 133464543645521 in words is "one hundred thirty-three trillion, four hundred sixty-four billion, five hundred forty-three million, six hundred forty-five thousand, five hundred twenty-one".