1005220572065 has 8 divisors (see below), whose sum is σ = 1211532219240. Its totient is φ = 800664769152.

The previous prime is 1005220572061. The next prime is 1005220572091. The reversal of 1005220572065 is 5602750225001.

It can be written as a sum of positive squares in 4 ways, for example, as 182134339984 + 823086232081 = 426772^2 + 907241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1005220572065 - 2² = 1005220572061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1005220572061) 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, 438959804 + ... + 438962093.

It is an arithmetic number, because the mean of its divisors is an integer number (151441527405).

Almost surely, 2^{1005220572065} is an apocalyptic number.

It is an amenable number.

1005220572065 is a deficient number, since it is larger than the sum of its proper divisors (206311647175).

1005220572065 is an equidigital number, since it uses as much as digits as its factorization.

1005220572065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877922131.

The product of its (nonzero) digits is 42000, while the sum is 35.

Adding to 1005220572065 its reverse (5602750225001), we get a palindrome (6607970797066).

The spelling of 1005220572065 in words is "one trillion, five billion, two hundred twenty million, five hundred seventy-two thousand, sixty-five".