131044445545 has 16 divisors (see below), whose sum is σ = 169359683472. Its totient is φ = 96765603840.

The previous prime is 131044445533. The next prime is 131044445551. The reversal of 131044445545 is 545544440131.

It can be written as a sum of positive squares in 8 ways, for example, as 7014397504 + 124030048041 = 83752^2 + 352179^2 .

It is not a de Polignac number, because 131044445545 - 2⁹ = 131044445033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131044445498 and 131044445507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1292829 + ... + 1390501.

It is an arithmetic number, because the mean of its divisors is an integer number (10584980217).

Almost surely, 2^131044445545 is an apocalyptic number.

It is an amenable number.

131044445545 is a deficient number, since it is larger than the sum of its proper divisors (38315237927).

131044445545 is a wasteful number, since it uses less digits than its factorization.

131044445545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118332.

The product of its (nonzero) digits is 384000, while the sum is 40.

Adding to 131044445545 its reverse (545544440131), we get a palindrome (676588885676).

The spelling of 131044445545 in words is "one hundred thirty-one billion, forty-four million, four hundred forty-five thousand, five hundred forty-five".