545523561 has 12 divisors (see below), whose sum is σ = 859613040. Its totient is φ = 330620280.

The previous prime is 545523551. The next prime is 545523569. The reversal of 545523561 is 165325545.

545523561 is a `hidden beast` number, since 5 + 45 + 52 + 3 + 561 = 666.

It is not a de Polignac number, because 545523561 - 2⁵ = 545523529 is a prime.

It is a super-2 number, since 2×545523561² = 595191911212241442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (545523569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2755071 + ... + 2755268.

It is an arithmetic number, because the mean of its divisors is an integer number (71634420).

Almost surely, 2^545523561 is an apocalyptic number.

It is an amenable number.

545523561 is a deficient number, since it is larger than the sum of its proper divisors (314089479).

545523561 is a wasteful number, since it uses less digits than its factorization.

545523561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510356 (or 5510353 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 545523561 is about 23356.4458126659. The cubic root of 545523561 is about 817.0923995618.

The spelling of 545523561 in words is "five hundred forty-five million, five hundred twenty-three thousand, five hundred sixty-one".