133381258561 has 2 divisors, whose sum is σ = 133381258562. Its totient is φ = 133381258560.

The previous prime is 133381258531. The next prime is 133381258583. The reversal of 133381258561 is 165852183331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92473769025 + 40907489536 = 304095^2 + 202256^2 .

It is a cyclic number.

It is not a de Polignac number, because 133381258561 - 2⁵ = 133381258529 is a prime.

It is not a weakly prime, because it can be changed into another prime (133381258531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66690629280 + 66690629281.

It is an arithmetic number, because the mean of its divisors is an integer number (66690629281).

Almost surely, 2^133381258561 is an apocalyptic number.

It is an amenable number.

133381258561 is a deficient number, since it is larger than the sum of its proper divisors (1).

133381258561 is an equidigital number, since it uses as much as digits as its factorization.

133381258561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 46.

The spelling of 133381258561 in words is "one hundred thirty-three billion, three hundred eighty-one million, two hundred fifty-eight thousand, five hundred sixty-one".