131444273665 has 8 divisors (see below), whose sum is σ = 157736238120. Its totient is φ = 105153345792.

The previous prime is 131444273663. The next prime is 131444273707. The reversal of 131444273665 is 566372444131.

It can be written as a sum of positive squares in 4 ways, for example, as 81514818064 + 49929455601 = 285508^2 + 223449^2 .

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 131444273665 - 2¹ = 131444273663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131444273663) 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, 54297 + ... + 515593.

It is an arithmetic number, because the mean of its divisors is an integer number (19717029765).

Almost surely, 2^131444273665 is an apocalyptic number.

It is an amenable number.

131444273665 is a deficient number, since it is larger than the sum of its proper divisors (26291964455).

131444273665 is an equidigital number, since it uses as much as digits as its factorization.

131444273665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518291.

The product of its digits is 1451520, while the sum is 46.

The spelling of 131444273665 in words is "one hundred thirty-one billion, four hundred forty-four million, two hundred seventy-three thousand, six hundred sixty-five".