65801090020 has 24 divisors (see below), whose sum is σ = 138592339704. Its totient is φ = 26242331136.

The previous prime is 65801089993. The next prime is 65801090023. The reversal of 65801090020 is 2009010856.

It can be written as a sum of positive squares in 4 ways, for example, as 2549846016 + 63251244004 = 50496^2 + 251498^2 .

It is not an unprimeable number, because it can be changed into a prime (65801090023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4874647 + ... + 4888126.

It is an arithmetic number, because the mean of its divisors is an integer number (5774680821).

Almost surely, 2^65801090020 is an apocalyptic number.

It is an amenable number.

65801090020 is an abundant number, since it is smaller than the sum of its proper divisors (72791249684).

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

65801090020 is a wasteful number, since it uses less digits than its factorization.

65801090020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9763119 (or 9763117 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 65801090020 in words is "sixty-five billion, eight hundred one million, ninety thousand, twenty".