131561545423 has 48 divisors (see below), whose sum is σ = 168682860288. Its totient is φ = 99665596800.

The previous prime is 131561545403. The next prime is 131561545441. The reversal of 131561545423 is 324545165131.

It is not a de Polignac number, because 131561545423 - 2¹⁷ = 131561414351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131561545403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28333140 + ... + 28337782.

It is an arithmetic number, because the mean of its divisors is an integer number (3514226256).

Almost surely, 2^131561545423 is an apocalyptic number.

131561545423 is a deficient number, since it is larger than the sum of its proper divisors (37121314865).

131561545423 is an equidigital number, since it uses as much as digits as its factorization.

131561545423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4876 (or 4805 counting only the distinct ones).

The product of its digits is 216000, while the sum is 40.

The spelling of 131561545423 in words is "one hundred thirty-one billion, five hundred sixty-one million, five hundred forty-five thousand, four hundred twenty-three".