784847848817 has 2 divisors, whose sum is σ = 784847848818. Its totient is φ = 784847848816.

The previous prime is 784847848793. The next prime is 784847848849. The reversal of 784847848817 is 718848748487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427717308001 + 357130540816 = 654001^2 + 597604^2 .

It is a cyclic number.

It is not a de Polignac number, because 784847848817 - 2¹⁸ = 784847586673 is a prime.

It is a super-2 number, since 2×784847848817² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (784847848877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392423924408 + 392423924409.

It is an arithmetic number, because the mean of its divisors is an integer number (392423924409).

Almost surely, 2^784847848817 is an apocalyptic number.

It is an amenable number.

784847848817 is a deficient number, since it is larger than the sum of its proper divisors (1).

784847848817 is an equidigital number, since it uses as much as digits as its factorization.

784847848817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 719323136, while the sum is 74.

The spelling of 784847848817 in words is "seven hundred eighty-four billion, eight hundred forty-seven million, eight hundred forty-eight thousand, eight hundred seventeen".