1604806525397 has 2 divisors, whose sum is σ = 1604806525398. Its totient is φ = 1604806525396.

The previous prime is 1604806525373. The next prime is 1604806525453. The reversal of 1604806525397 is 7935256084061.

It is an a-pointer prime, because the next prime (1604806525453) can be obtained adding 1604806525397 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1598199111601 + 6607413796 = 1264199^2 + 81286^2 .

It is an emirp because it is prime and its reverse (7935256084061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1604806525397 - 2⁸ = 1604806525141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604806525307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802403262698 + 802403262699.

It is an arithmetic number, because the mean of its divisors is an integer number (802403262699).

It is a 1-persistent number, because it is pandigital, but 2⋅1604806525397 = 3209613050794 is not.

Almost surely, 2^{1604806525397} is an apocalyptic number.

It is an amenable number.

1604806525397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604806525397 is an equidigital number, since it uses as much as digits as its factorization.

1604806525397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 56.

The spelling of 1604806525397 in words is "one trillion, six hundred four billion, eight hundred six million, five hundred twenty-five thousand, three hundred ninety-seven".