781807848343 has 2 divisors, whose sum is σ = 781807848344. Its totient is φ = 781807848342.

The previous prime is 781807848323. The next prime is 781807848373. The reversal of 781807848343 is 343848708187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 781807848343 - 2³³ = 773217913751 is a prime.

It is a super-2 number, since 2×781807848343² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (781807848323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390903924171 + 390903924172.

It is an arithmetic number, because the mean of its divisors is an integer number (390903924172).

Almost surely, 2^781807848343 is an apocalyptic number.

781807848343 is a deficient number, since it is larger than the sum of its proper divisors (1).

781807848343 is an equidigital number, since it uses as much as digits as its factorization.

781807848343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28901376, while the sum is 61.

The spelling of 781807848343 in words is "seven hundred eighty-one billion, eight hundred seven million, eight hundred forty-eight thousand, three hundred forty-three".