545165604 has 18 divisors (see below), whose sum is σ = 1378057590. Its totient is φ = 181721856.

The previous prime is 545165591. The next prime is 545165623. The reversal of 545165604 is 406561545.

545165604 is a `hidden beast` number, since 5 + 45 + 1 + 6 + 5 + 604 = 666.

It can be written as a sum of positive squares in only one way, i.e., 278823204 + 266342400 = 16698^2 + 16320^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 15143489 = 545165604 / (5 + 4 + 5 + 1 + 6 + 5 + 6 + 0 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7571709 + ... + 7571780.

It is an arithmetic number, because the mean of its divisors is an integer number (76558755).

Almost surely, 2^545165604 is an apocalyptic number.

It is an amenable number.

545165604 is an abundant number, since it is smaller than the sum of its proper divisors (832891986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

545165604 is a wasteful number, since it uses less digits than its factorization.

545165604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15143499 (or 15143494 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 545165604 is about 23348.7816384496. The cubic root of 545165604 is about 816.9136428826.

The spelling of 545165604 in words is "five hundred forty-five million, one hundred sixty-five thousand, six hundred four".