1787081104117 has 2 divisors, whose sum is σ = 1787081104118. Its totient is φ = 1787081104116.

The previous prime is 1787081104103. The next prime is 1787081104153. The reversal of 1787081104117 is 7114011807871.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1691979179121 + 95101924996 = 1300761^2 + 308386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1787081104117 - 2¹⁹ = 1787080579829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1787081104217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 893540552058 + 893540552059.

It is an arithmetic number, because the mean of its divisors is an integer number (893540552059).

Almost surely, 2^{1787081104117} is an apocalyptic number.

It is an amenable number.

1787081104117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1787081104117 is an equidigital number, since it uses as much as digits as its factorization.

1787081104117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87808, while the sum is 46.

The spelling of 1787081104117 in words is "one trillion, seven hundred eighty-seven billion, eighty-one million, one hundred four thousand, one hundred seventeen".