133403554961 has 2 divisors, whose sum is σ = 133403554962. Its totient is φ = 133403554960.

The previous prime is 133403554919. The next prime is 133403554967. The reversal of 133403554961 is 169455304331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126266515600 + 7137039361 = 355340^2 + 84481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133403554961 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (133403554967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66701777480 + 66701777481.

It is an arithmetic number, because the mean of its divisors is an integer number (66701777481).

Almost surely, 2^133403554961 is an apocalyptic number.

It is an amenable number.

133403554961 is a deficient number, since it is larger than the sum of its proper divisors (1).

133403554961 is an equidigital number, since it uses as much as digits as its factorization.

133403554961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 133403554961 in words is "one hundred thirty-three billion, four hundred three million, five hundred fifty-four thousand, nine hundred sixty-one".