133111754561 has 4 divisors (see below), whose sum is σ = 140117636400. Its totient is φ = 126105872724.

The previous prime is 133111754543. The next prime is 133111754627. The reversal of 133111754561 is 165457111331.

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: 165457111331 = 227 ⋅728885953.

It is not a de Polignac number, because 133111754561 - 2²⁶ = 133044645697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133111754861) 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, 3502940891 + ... + 3502940928.

It is an arithmetic number, because the mean of its divisors is an integer number (35029409100).

Almost surely, 2^133111754561 is an apocalyptic number.

It is an amenable number.

133111754561 is a deficient number, since it is larger than the sum of its proper divisors (7005881839).

133111754561 is an equidigital number, since it uses as much as digits as its factorization.

133111754561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7005881838.

The product of its digits is 37800, while the sum is 38.

Adding to 133111754561 its reverse (165457111331), we get a palindrome (298568865892).

The spelling of 133111754561 in words is "one hundred thirty-three billion, one hundred eleven million, seven hundred fifty-four thousand, five hundred sixty-one".