545378569 has 4 divisors (see below), whose sum is σ = 547319700. Its totient is φ = 543437440.

The previous prime is 545378563. The next prime is 545378621. The reversal of 545378569 is 965873545.

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

It can be written as a sum of positive squares in 2 ways, for example, as 492307344 + 53071225 = 22188^2 + 7285^2 .

It is a cyclic number.

It is not a de Polignac number, because 545378569 - 2⁷ = 545378441 is a prime.

It is a super-2 number, since 2×545378569² = 594875567048975522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545378563) 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, 970144 + ... + 970705.

It is an arithmetic number, because the mean of its divisors is an integer number (136829925).

Almost surely, 2^545378569 is an apocalyptic number.

It is an amenable number.

545378569 is a deficient number, since it is larger than the sum of its proper divisors (1941131).

545378569 is a wasteful number, since it uses less digits than its factorization.

545378569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941130.

The product of its digits is 4536000, while the sum is 52.

The square root of 545378569 is about 23353.3417094856. The cubic root of 545378569 is about 817.0200028362.

The spelling of 545378569 in words is "five hundred forty-five million, three hundred seventy-eight thousand, five hundred sixty-nine".