1785353853497 has 2 divisors, whose sum is σ = 1785353853498. Its totient is φ = 1785353853496.

The previous prime is 1785353853467. The next prime is 1785353853551. The reversal of 1785353853497 is 7943583535871.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1466918234896 + 318435618601 = 1211164^2 + 564301^2 .

It is an emirp because it is prime and its reverse (7943583535871) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1785353853497 - 2¹² = 1785353849401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1785353853407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 892676926748 + 892676926749.

It is an arithmetic number, because the mean of its divisors is an integer number (892676926749).

Almost surely, 2^{1785353853497} is an apocalyptic number.

It is an amenable number.

1785353853497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1785353853497 is an equidigital number, since it uses as much as digits as its factorization.

1785353853497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024000, while the sum is 68.

The spelling of 1785353853497 in words is "one trillion, seven hundred eighty-five billion, three hundred fifty-three million, eight hundred fifty-three thousand, four hundred ninety-seven".