133481494961 has 2 divisors, whose sum is σ = 133481494962. Its totient is φ = 133481494960.

The previous prime is 133481494943. The next prime is 133481494997. The reversal of 133481494961 is 169494184331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70119040000 + 63362454961 = 264800^2 + 251719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133481494961 is a prime.

It is not a weakly prime, because it can be changed into another prime (133481494061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66740747480 + 66740747481.

It is an arithmetic number, because the mean of its divisors is an integer number (66740747481).

Almost surely, 2^133481494961 is an apocalyptic number.

It is an amenable number.

133481494961 is a deficient number, since it is larger than the sum of its proper divisors (1).

133481494961 is an equidigital number, since it uses as much as digits as its factorization.

133481494961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 53.

The spelling of 133481494961 in words is "one hundred thirty-three billion, four hundred eighty-one million, four hundred ninety-four thousand, nine hundred sixty-one".