6565149998 has 36 divisors (see below), whose sum is σ = 11498662896. Its totient is φ = 2808590400.

The previous prime is 6565149991. The next prime is 6565150013. The reversal of 6565149998 is 8999415656.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6565149998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6565149991) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23003 + ... + 116873.

Almost surely, 2^6565149998 is an apocalyptic number.

6565149998 is a deficient number, since it is larger than the sum of its proper divisors (4933512898).

6565149998 is a wasteful number, since it uses less digits than its factorization.

6565149998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93929 (or 93901 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 62.

The square root of 6565149998 is about 81025.6132219930. The cubic root of 6565149998 is about 1872.4700692006.

The spelling of 6565149998 in words is "six billion, five hundred sixty-five million, one hundred forty-nine thousand, nine hundred ninety-eight".