131355145005545 has 8 divisors (see below), whose sum is σ = 157627238292360. Its totient is φ = 105083406480640.

The previous prime is 131355145005541. The next prime is 131355145005563. The reversal of 131355145005545 is 545500541553131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22602617316841 + 108752527688704 = 4754221^2 + 10428448^2 .

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

It is not a de Polignac number, because 131355145005545 - 2² = 131355145005541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131355145005545.

It is not an unprimeable number, because it can be changed into a prime (131355145005541) 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, 87875216 + ... + 89357505.

It is an arithmetic number, because the mean of its divisors is an integer number (19703404786545).

Almost surely, 2^{131355145005545} is an apocalyptic number.

It is an amenable number.

131355145005545 is a deficient number, since it is larger than the sum of its proper divisors (26272093286815).

131355145005545 is a wasteful number, since it uses less digits than its factorization.

131355145005545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177380955.

The product of its (nonzero) digits is 2250000, while the sum is 47.

Adding to 131355145005545 its reverse (545500541553131), we get a palindrome (676855686558676).

The spelling of 131355145005545 in words is "one hundred thirty-one trillion, three hundred fifty-five billion, one hundred forty-five million, five thousand, five hundred forty-five".