6545868875 has 128 divisors (see below), whose sum is σ = 10495500288. Its totient is φ = 3965760000.

The previous prime is 6545868871. The next prime is 6545868881. The reversal of 6545868875 is 5788685456.

It is a happy number.

It is not a de Polignac number, because 6545868875 - 2² = 6545868871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6545868871) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 43350050 + ... + 43350200.

It is an arithmetic number, because the mean of its divisors is an integer number (81996096).

Almost surely, 2^6545868875 is an apocalyptic number.

6545868875 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6545868875 is a deficient number, since it is larger than the sum of its proper divisors (3949631413).

6545868875 is a wasteful number, since it uses less digits than its factorization.

6545868875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 316 counting only the distinct ones).

The product of its digits is 64512000, while the sum is 62.

The square root of 6545868875 is about 80906.5440801917. The cubic root of 6545868875 is about 1870.6351922447.

The spelling of 6545868875 in words is "six billion, five hundred forty-five million, eight hundred sixty-eight thousand, eight hundred seventy-five".