144477782506 has 4 divisors (see below), whose sum is σ = 216716673762. Its totient is φ = 72238891252.

The previous prime is 144477782459. The next prime is 144477782507. The reversal of 144477782506 is 605287774441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605287774441 = 7 ⋅86469682063.

It can be written as a sum of positive squares in only one way, i.e., 144469168281 + 8614225 = 380091^2 + 2935^2 .

It is not an unprimeable number, because it can be changed into a prime (144477782507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36119445625 + ... + 36119445628.

Almost surely, 2^144477782506 is an apocalyptic number.

144477782506 is a deficient number, since it is larger than the sum of its proper divisors (72238891256).

144477782506 is an equidigital number, since it uses as much as digits as its factorization.

144477782506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72238891255.

The product of its (nonzero) digits is 10536960, while the sum is 55.

The spelling of 144477782506 in words is "one hundred forty-four billion, four hundred seventy-seven million, seven hundred eighty-two thousand, five hundred six".