545715569 has 4 divisors (see below), whose sum is σ = 623674944. Its totient is φ = 467756196.

The previous prime is 545715559. The next prime is 545715581. The reversal of 545715569 is 965517545.

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, and also an emirpimes, since its reverse is a distinct semiprime: 965517545 = 5 ⋅193103509.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545715569 is a prime.

It is a super-2 number, since 2×545715569² = 595610964497987522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545715539) 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, 38979677 + ... + 38979690.

It is an arithmetic number, because the mean of its divisors is an integer number (155918736).

Almost surely, 2^545715569 is an apocalyptic number.

It is an amenable number.

545715569 is a deficient number, since it is larger than the sum of its proper divisors (77959375).

545715569 is an equidigital number, since it uses as much as digits as its factorization.

545715569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77959374.

The product of its digits is 945000, while the sum is 47.

The square root of 545715569 is about 23360.5558367090. Note that the first 3 decimals coincide. The cubic root of 545715569 is about 817.1882523569.

The spelling of 545715569 in words is "five hundred forty-five million, seven hundred fifteen thousand, five hundred sixty-nine".