133651005635281 has 2 divisors, whose sum is σ = 133651005635282. Its totient is φ = 133651005635280.

The previous prime is 133651005635219. The next prime is 133651005635321. The reversal of 133651005635281 is 182536500156331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125274496226881 + 8376509408400 = 11192609^2 + 2894220^2 .

It is a cyclic number.

It is not a de Polignac number, because 133651005635281 - 2¹⁷ = 133651005504209 is a prime.

It is a super-2 number, since 2×133651005635281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133651005935281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66825502817640 + 66825502817641.

It is an arithmetic number, because the mean of its divisors is an integer number (66825502817641).

Almost surely, 2^{133651005635281} is an apocalyptic number.

It is an amenable number.

133651005635281 is a deficient number, since it is larger than the sum of its proper divisors (1).

133651005635281 is an equidigital number, since it uses as much as digits as its factorization.

133651005635281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 49.

The spelling of 133651005635281 in words is "one hundred thirty-three trillion, six hundred fifty-one billion, five million, six hundred thirty-five thousand, two hundred eighty-one".