133541657861 has 2 divisors, whose sum is σ = 133541657862. Its totient is φ = 133541657860.

The previous prime is 133541657849. The next prime is 133541657869. The reversal of 133541657861 is 168756145331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73817629636 + 59724028225 = 271694^2 + 244385^2 .

It is an emirp because it is prime and its reverse (168756145331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133541657861 - 2¹⁴ = 133541641477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133541657869) 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 as a sum of consecutive naturals, namely, 66770828930 + 66770828931.

It is an arithmetic number, because the mean of its divisors is an integer number (66770828931).

Almost surely, 2^133541657861 is an apocalyptic number.

It is an amenable number.

133541657861 is a deficient number, since it is larger than the sum of its proper divisors (1).

133541657861 is an equidigital number, since it uses as much as digits as its factorization.

133541657861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 50.

The spelling of 133541657861 in words is "one hundred thirty-three billion, five hundred forty-one million, six hundred fifty-seven thousand, eight hundred sixty-one".