1320518790025 has 6 divisors (see below), whose sum is σ = 1637443299662. Its totient is φ = 1056415032000.

The previous prime is 1320518790023. The next prime is 1320518790067. The reversal of 1320518790025 is 5200978150231.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 310837470784 + 1009681319241 = 557528^2 + 1004829^2 .

It is not a de Polignac number, because 1320518790025 - 2¹ = 1320518790023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320518790023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26410375776 + ... + 26410375825.

Almost surely, 2^{1320518790025} is an apocalyptic number.

It is an amenable number.

1320518790025 is a deficient number, since it is larger than the sum of its proper divisors (316924509637).

1320518790025 is an equidigital number, since it uses as much as digits as its factorization.

1320518790025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52820751611 (or 52820751606 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 1320518790025 in words is "one trillion, three hundred twenty billion, five hundred eighteen million, seven hundred ninety thousand, twenty-five".