545277643 has 4 divisors (see below), whose sum is σ = 550899160. Its totient is φ = 539656128.

The previous prime is 545277641. The next prime is 545277647. The reversal of 545277643 is 346772545.

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 545277643 - 2¹ = 545277641 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 545277643.

It is not an unprimeable number, because it can be changed into a prime (545277641) 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, 2810613 + ... + 2810806.

It is an arithmetic number, because the mean of its divisors is an integer number (137724790).

Almost surely, 2^545277643 is an apocalyptic number.

545277643 is a deficient number, since it is larger than the sum of its proper divisors (5621517).

545277643 is an equidigital number, since it uses as much as digits as its factorization.

545277643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5621516.

The product of its digits is 705600, while the sum is 43.

The square root of 545277643 is about 23351.1807624368. The cubic root of 545277643 is about 816.9696013643.

The spelling of 545277643 in words is "five hundred forty-five million, two hundred seventy-seven thousand, six hundred forty-three".