6540118785 has 24 divisors (see below), whose sum is σ = 11453081640. Its totient is φ = 3452101632.

The previous prime is 6540118709. The next prime is 6540118787. The reversal of 6540118785 is 5878110456.

6540118785 is a `hidden beast` number, since 65 + 401 + 187 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 6540118641 = 12^2 + 80871^2 .

It is not a de Polignac number, because 6540118785 - 2¹⁵ = 6540086017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6540118785.

It is not an unprimeable number, because it can be changed into a prime (6540118787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 744790 + ... + 753519.

It is an arithmetic number, because the mean of its divisors is an integer number (477211735).

Almost surely, 2^6540118785 is an apocalyptic number.

It is an amenable number.

6540118785 is a deficient number, since it is larger than the sum of its proper divisors (4912962855).

6540118785 is a wasteful number, since it uses less digits than its factorization.

6540118785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498417 (or 1498414 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The square root of 6540118785 is about 80871.0008903068. Note that the first 3 decimals coincide. The cubic root of 6540118785 is about 1870.0872908627.

The spelling of 6540118785 in words is "six billion, five hundred forty million, one hundred eighteen thousand, seven hundred eighty-five".