840805411023 has 16 divisors (see below), whose sum is σ = 1299795805440. Its totient is φ = 536165768952.

The previous prime is 840805411021. The next prime is 840805411027. The reversal of 840805411023 is 320114508048.

840805411023 is a `hidden beast` number, since 8 + 4 + 0 + 8 + 0 + 541 + 102 + 3 = 666.

It is not a de Polignac number, because 840805411023 - 2¹ = 840805411021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840805411021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676976361 + ... + 676977602.

It is an arithmetic number, because the mean of its divisors is an integer number (81237237840).

Almost surely, 2^840805411023 is an apocalyptic number.

840805411023 is a deficient number, since it is larger than the sum of its proper divisors (458990394417).

840805411023 is a wasteful number, since it uses less digits than its factorization.

840805411023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353953995 (or 1353953989 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 840805411023 in words is "eight hundred forty billion, eight hundred five million, four hundred eleven thousand, twenty-three".