65500980909 has 64 divisors (see below), whose sum is σ = 113914999296. Its totient is φ = 32488095744.

The previous prime is 65500980907. The next prime is 65500980911. The reversal of 65500980909 is 90908900556.

It is an interprime number because it is at equal distance from previous prime (65500980907) and next prime (65500980911).

It is not a de Polignac number, because 65500980909 - 2¹ = 65500980907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65500980901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5642299 + ... + 5653895.

It is an arithmetic number, because the mean of its divisors is an integer number (1779921864).

Almost surely, 2^65500980909 is an apocalyptic number.

It is an amenable number.

65500980909 is a deficient number, since it is larger than the sum of its proper divisors (48414018387).

65500980909 is a wasteful number, since it uses less digits than its factorization.

65500980909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12854.

The product of its (nonzero) digits is 874800, while the sum is 51.

The spelling of 65500980909 in words is "sixty-five billion, five hundred million, nine hundred eighty thousand, nine hundred nine".