132561797261 has 2 divisors, whose sum is σ = 132561797262. Its totient is φ = 132561797260.

The previous prime is 132561797227. The next prime is 132561797297. The reversal of 132561797261 is 162797165231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131845967236 + 715830025 = 363106^2 + 26755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-132561797261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132561797201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66280898630 + 66280898631.

It is an arithmetic number, because the mean of its divisors is an integer number (66280898631).

Almost surely, 2^132561797261 is an apocalyptic number.

It is an amenable number.

132561797261 is a deficient number, since it is larger than the sum of its proper divisors (1).

132561797261 is an equidigital number, since it uses as much as digits as its factorization.

132561797261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 50.

The spelling of 132561797261 in words is "one hundred thirty-two billion, five hundred sixty-one million, seven hundred ninety-seven thousand, two hundred sixty-one".