1245884580865 has 16 divisors (see below), whose sum is σ = 1500274047888. Its totient is φ = 993233131776.

The previous prime is 1245884580833. The next prime is 1245884580949. The reversal of 1245884580865 is 5680854885421.

It is a happy number.

It is a Cunningham number, because it is equal to 1116192²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 197306532864 + 1048578048001 = 444192^2 + 1024001^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245884580865 - 2⁵ = 1245884580833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245884580797 and 1245884580806.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29532367 + ... + 29574523.

It is an arithmetic number, because the mean of its divisors is an integer number (93767127993).

Almost surely, 2^{1245884580865} is an apocalyptic number.

It is an amenable number.

1245884580865 is a deficient number, since it is larger than the sum of its proper divisors (254389467023).

1245884580865 is a wasteful number, since it uses less digits than its factorization.

1245884580865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62628.

The product of its (nonzero) digits is 98304000, while the sum is 64.

The spelling of 1245884580865 in words is "one trillion, two hundred forty-five billion, eight hundred eighty-four million, five hundred eighty thousand, eight hundred sixty-five".