132506557561 has 4 divisors (see below), whose sum is σ = 151436065792. Its totient is φ = 113577049332.

The previous prime is 132506557549. The next prime is 132506557583. The reversal of 132506557561 is 165755605231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 132506557561 - 2¹⁹ = 132506033273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (132506557501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9464754105 + ... + 9464754118.

It is an arithmetic number, because the mean of its divisors is an integer number (37859016448).

Almost surely, 2^132506557561 is an apocalyptic number.

It is an amenable number.

132506557561 is a deficient number, since it is larger than the sum of its proper divisors (18929508231).

132506557561 is an equidigital number, since it uses as much as digits as its factorization.

132506557561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18929508230.

The product of its (nonzero) digits is 945000, while the sum is 46.

The spelling of 132506557561 in words is "one hundred thirty-two billion, five hundred six million, five hundred fifty-seven thousand, five hundred sixty-one".