545443726273 has 4 divisors (see below), whose sum is σ = 545781882708. Its totient is φ = 545105569840.

The previous prime is 545443726259. The next prime is 545443726297. The reversal of 545443726273 is 372627344545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372627344545 = 5 ⋅74525468909.

It can be written as a sum of positive squares in 2 ways, for example, as 345828677184 + 199615049089 = 588072^2 + 446783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545443726273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 545443726273.

It is not an unprimeable number, because it can be changed into a prime (545443726873) 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, 169075798 + ... + 169079023.

It is an arithmetic number, because the mean of its divisors is an integer number (136445470677).

Almost surely, 2^545443726273 is an apocalyptic number.

It is an amenable number.

545443726273 is a deficient number, since it is larger than the sum of its proper divisors (338156435).

545443726273 is a wasteful number, since it uses less digits than its factorization.

545443726273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338156434.

The product of its digits is 16934400, while the sum is 52.

The spelling of 545443726273 in words is "five hundred forty-five billion, four hundred forty-three million, seven hundred twenty-six thousand, two hundred seventy-three".