6565777340645 has 32 divisors (see below), whose sum is σ = 8340791132160. Its totient is φ = 4947885000000.

The previous prime is 6565777340641. The next prime is 6565777340699. The reversal of 6565777340645 is 5460437775656.

It is not a de Polignac number, because 6565777340645 - 2² = 6565777340641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565777340641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40764020 + ... + 40924770.

It is an arithmetic number, because the mean of its divisors is an integer number (260649722880).

Almost surely, 2^{6565777340645} is an apocalyptic number.

It is an amenable number.

6565777340645 is a deficient number, since it is larger than the sum of its proper divisors (1775013791515).

6565777340645 is a wasteful number, since it uses less digits than its factorization.

6565777340645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163217.

The product of its (nonzero) digits is 444528000, while the sum is 65.

The spelling of 6565777340645 in words is "six trillion, five hundred sixty-five billion, seven hundred seventy-seven million, three hundred forty thousand, six hundred forty-five".