1785353853551 has 2 divisors, whose sum is σ = 1785353853552. Its totient is φ = 1785353853550.

The previous prime is 1785353853497. The next prime is 1785353853559. The reversal of 1785353853551 is 1553583535871.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1553583535871) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1785353853551 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1785353853559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 892676926775 + 892676926776.

It is an arithmetic number, because the mean of its divisors is an integer number (892676926776).

Almost surely, 2^{1785353853551} is an apocalyptic number.

1785353853551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1785353853551 is an equidigital number, since it uses as much as digits as its factorization.

1785353853551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800000, while the sum is 59.

The spelling of 1785353853551 in words is "one trillion, seven hundred eighty-five billion, three hundred fifty-three million, eight hundred fifty-three thousand, five hundred fifty-one".