65105102020 has 96 divisors (see below), whose sum is σ = 159999840000. Its totient is φ = 21798911232.

The previous prime is 65105102017. The next prime is 65105102021. The reversal of 65105102020 is 2020150156.

It is a junction number, because it is equal to n+sod(n) for n = 65105101982 and 65105102000.

It is not an unprimeable number, because it can be changed into a prime (65105102021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11128056 + ... + 11133904.

It is an arithmetic number, because the mean of its divisors is an integer number (1666665000).

Almost surely, 2^65105102020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65105102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79999920000).

65105102020 is an abundant number, since it is smaller than the sum of its proper divisors (94894737980).

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

65105102020 is an equidigital number, since it uses as much as digits as its factorization.

65105102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5994 (or 5906 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 65105102020 its reverse (2020150156), we get a palindrome (67125252176).

The spelling of 65105102020 in words is "sixty-five billion, one hundred five million, one hundred two thousand, twenty".