131366460561 has 32 divisors (see below), whose sum is σ = 203888133120. Its totient is φ = 73679022144.

The previous prime is 131366460527. The next prime is 131366460707. The reversal of 131366460561 is 165064663131.

It is not a de Polignac number, because 131366460561 - 2¹⁴ = 131366444177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131366462561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 714231 + ... + 879123.

It is an arithmetic number, because the mean of its divisors is an integer number (6371504160).

Almost surely, 2^131366460561 is an apocalyptic number.

It is an amenable number.

131366460561 is a deficient number, since it is larger than the sum of its proper divisors (72521672559).

131366460561 is a wasteful number, since it uses less digits than its factorization.

131366460561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165605.

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 131366460561 in words is "one hundred thirty-one billion, three hundred sixty-six million, four hundred sixty thousand, five hundred sixty-one".