6565642351 has 4 divisors (see below), whose sum is σ = 6718331752. Its totient is φ = 6412952952.

The previous prime is 6565642333. The next prime is 6565642357. The reversal of 6565642351 is 1532465656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6565642351 - 2⁵ = 6565642319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 152689357 = 6565642351 / (6 + 5 + 6 + 5 + 6 + 4 + 2 + 3 + 5 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6565642298 and 6565642307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565642357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76344636 + ... + 76344721.

It is an arithmetic number, because the mean of its divisors is an integer number (1679582938).

Almost surely, 2^6565642351 is an apocalyptic number.

6565642351 is a deficient number, since it is larger than the sum of its proper divisors (152689401).

6565642351 is a wasteful number, since it uses less digits than its factorization.

6565642351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152689400.

The product of its digits is 648000, while the sum is 43.

The square root of 6565642351 is about 81028.6514203464. The cubic root of 6565642351 is about 1872.5168766211.

The spelling of 6565642351 in words is "six billion, five hundred sixty-five million, six hundred forty-two thousand, three hundred fifty-one".