144643473947 has 4 divisors (see below), whose sum is σ = 165306827376. Its totient is φ = 123980120520.

The previous prime is 144643473941. The next prime is 144643473977. The reversal of 144643473947 is 749374346441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144643473947 - 2⁶ = 144643473883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144643473892 and 144643473901.

It is not an unprimeable number, because it can be changed into a prime (144643473941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10331676704 + ... + 10331676717.

It is an arithmetic number, because the mean of its divisors is an integer number (41326706844).

Almost surely, 2^144643473947 is an apocalyptic number.

144643473947 is a deficient number, since it is larger than the sum of its proper divisors (20663353429).

144643473947 is an equidigital number, since it uses as much as digits as its factorization.

144643473947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20663353428.

The product of its digits is 24385536, while the sum is 56.

The spelling of 144643473947 in words is "one hundred forty-four billion, six hundred forty-three million, four hundred seventy-three thousand, nine hundred forty-seven".