131445035561 has 8 divisors (see below), whose sum is σ = 150267488064. Its totient is φ = 112633730640.

The previous prime is 131445035537. The next prime is 131445035563. The reversal of 131445035561 is 165530544131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131445035561 - 2¹⁸ = 131444773417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131445035563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2761610 + ... + 2808803.

It is an arithmetic number, because the mean of its divisors is an integer number (18783436008).

Almost surely, 2^131445035561 is an apocalyptic number.

It is an amenable number.

131445035561 is a deficient number, since it is larger than the sum of its proper divisors (18822452503).

131445035561 is an equidigital number, since it uses as much as digits as its factorization.

131445035561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5573791.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 131445035561 its reverse (165530544131), we get a palindrome (296975579692).

The spelling of 131445035561 in words is "one hundred thirty-one billion, four hundred forty-five million, thirty-five thousand, five hundred sixty-one".