781035916843 has 96 divisors (see below), whose sum is σ = 1038730936320. Its totient is φ = 580909190400.

The previous prime is 781035916799. The next prime is 781035916873. The reversal of 781035916843 is 348619530187.

It is not a de Polignac number, because 781035916843 - 2¹⁷ = 781035785771 is a prime.

It is a super-2 number, since 2×781035916843² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781035916873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 202811868 + ... + 202815718.

It is an arithmetic number, because the mean of its divisors is an integer number (10820113920).

Almost surely, 2^781035916843 is an apocalyptic number.

781035916843 is a deficient number, since it is larger than the sum of its proper divisors (257695019477).

781035916843 is a wasteful number, since it uses less digits than its factorization.

781035916843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137 (or 4130 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 781035916843 in words is "seven hundred eighty-one billion, thirty-five million, nine hundred sixteen thousand, eight hundred forty-three".