131440363645 has 4 divisors (see below), whose sum is σ = 157728436380. Its totient is φ = 105152290912.

The previous prime is 131440363643. The next prime is 131440363687. The reversal of 131440363645 is 546363044131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546363044131 = 113 ⋅4835071187.

It can be written as a sum of positive squares in 2 ways, for example, as 99913520281 + 31526843364 = 316091^2 + 177558^2 .

It is a cyclic number.

It is not a de Polignac number, because 131440363645 - 2¹ = 131440363643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131440363598 and 131440363607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131440363643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13144036360 + ... + 13144036369.

It is an arithmetic number, because the mean of its divisors is an integer number (39432109095).

Almost surely, 2^131440363645 is an apocalyptic number.

It is an amenable number.

131440363645 is a deficient number, since it is larger than the sum of its proper divisors (26288072735).

131440363645 is an equidigital number, since it uses as much as digits as its factorization.

131440363645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26288072734.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 131440363645 in words is "one hundred thirty-one billion, four hundred forty million, three hundred sixty-three thousand, six hundred forty-five".