132661463051581 has 2 divisors, whose sum is σ = 132661463051582. Its totient is φ = 132661463051580.

The previous prime is 132661463051567. The next prime is 132661463051629. The reversal of 132661463051581 is 185150364166231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119769844611481 + 12891618440100 = 10943941^2 + 3590490^2 .

It is a cyclic number.

It is not a de Polignac number, because 132661463051581 - 2¹⁷ = 132661462920509 is a prime.

It is a super-2 number, since 2×132661463051581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (132661463052581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66330731525790 + 66330731525791.

It is an arithmetic number, because the mean of its divisors is an integer number (66330731525791).

Almost surely, 2^{132661463051581} is an apocalyptic number.

It is an amenable number.

132661463051581 is a deficient number, since it is larger than the sum of its proper divisors (1).

132661463051581 is an equidigital number, since it uses as much as digits as its factorization.

132661463051581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 132661463051581 in words is "one hundred thirty-two trillion, six hundred sixty-one billion, four hundred sixty-three million, fifty-one thousand, five hundred eighty-one".