1020045002609 has 2 divisors, whose sum is σ = 1020045002610. Its totient is φ = 1020045002608.

The previous prime is 1020045002527. The next prime is 1020045002737. The reversal of 1020045002609 is 9062005400201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 767458346209 + 252586656400 = 876047^2 + 502580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020045002609 - 2¹² = 1020044998513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020045004609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510022501304 + 510022501305.

It is an arithmetic number, because the mean of its divisors is an integer number (510022501305).

Almost surely, 2^{1020045002609} is an apocalyptic number.

It is an amenable number.

1020045002609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020045002609 is an equidigital number, since it uses as much as digits as its factorization.

1020045002609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 1020045002609 in words is "one trillion, twenty billion, forty-five million, two thousand, six hundred nine".