6545440206 has 12 divisors (see below), whose sum is σ = 14181787152. Its totient is φ = 2181813396.

The previous prime is 6545440183. The next prime is 6545440217. The reversal of 6545440206 is 6020445456.

6545440206 is a `hidden beast` number, since 6 + 5 + 4 + 5 + 440 + 206 = 666.

It is a congruent number.

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, 181817766 + ... + 181817801.

It is an arithmetic number, because the mean of its divisors is an integer number (1181815596).

Almost surely, 2^6545440206 is an apocalyptic number.

6545440206 is an abundant number, since it is smaller than the sum of its proper divisors (7636346946).

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

6545440206 is a wasteful number, since it uses less digits than its factorization.

6545440206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363635575 (or 363635572 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 6545440206 is about 80903.8948753396. The cubic root of 6545440206 is about 1870.5943572877.

The spelling of 6545440206 in words is "six billion, five hundred forty-five million, four hundred forty thousand, two hundred six".