544420145509 has 4 divisors (see below), whose sum is σ = 544801660704. Its totient is φ = 544038630316.

The previous prime is 544420145419. The next prime is 544420145527. The reversal of 544420145509 is 905541024445.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 544420145509 - 2³³ = 535830210917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544420145609) 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, 190755457 + ... + 190758310.

It is an arithmetic number, because the mean of its divisors is an integer number (136200415176).

Almost surely, 2^544420145509 is an apocalyptic number.

It is an amenable number.

544420145509 is a deficient number, since it is larger than the sum of its proper divisors (381515195).

544420145509 is a wasteful number, since it uses less digits than its factorization.

544420145509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381515194.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 544420145509 in words is "five hundred forty-four billion, four hundred twenty million, one hundred forty-five thousand, five hundred nine".