133577044321 has 12 divisors (see below), whose sum is σ = 155838580032. Its totient is φ = 114494595012.

The previous prime is 133577044297. The next prime is 133577044351. The reversal of 133577044321 is 123440775331.

It is a happy number.

It is not a de Polignac number, because 133577044321 - 2¹⁵ = 133577011553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133577044351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3957045 + ... + 3990658.

It is an arithmetic number, because the mean of its divisors is an integer number (12986548336).

Almost surely, 2^133577044321 is an apocalyptic number.

It is an amenable number.

133577044321 is a deficient number, since it is larger than the sum of its proper divisors (22261535711).

133577044321 is an frugal number, since it uses more digits than its factorization.

133577044321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7947738 (or 7947710 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 133577044321 in words is "one hundred thirty-three billion, five hundred seventy-seven million, forty-four thousand, three hundred twenty-one".