6549047145 has 12 divisors (see below), whose sum is σ = 11351681796. Its totient is φ = 3492825120.

The previous prime is 6549047143. The next prime is 6549047159. The reversal of 6549047145 is 5417409456.

6549047145 is a `hidden beast` number, since 6 + 54 + 90 + 471 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1051121241 + 5497925904 = 32421^2 + 74148^2 .

It is not a de Polignac number, because 6549047145 - 2¹ = 6549047143 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 145534381 = 6549047145 / (6 + 5 + 4 + 9 + 0 + 4 + 7 + 1 + 4 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6549047145.

It is not an unprimeable number, because it can be changed into a prime (6549047143) 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, 72767146 + ... + 72767235.

It is an arithmetic number, because the mean of its divisors is an integer number (945973483).

Almost surely, 2^6549047145 is an apocalyptic number.

It is an amenable number.

6549047145 is a deficient number, since it is larger than the sum of its proper divisors (4802634651).

6549047145 is a wasteful number, since it uses less digits than its factorization.

6549047145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145534392 (or 145534389 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 6549047145 is about 80926.1833092356. The cubic root of 6549047145 is about 1870.9378982643.

The spelling of 6549047145 in words is "six billion, five hundred forty-nine million, forty-seven thousand, one hundred forty-five".