861268408043 has 2 divisors, whose sum is σ = 861268408044. Its totient is φ = 861268408042.

The previous prime is 861268408031. The next prime is 861268408069. The reversal of 861268408043 is 340804862168.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861268408043 - 2¹⁰ = 861268407019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 861268407982 and 861268408000.

It is not a weakly prime, because it can be changed into another prime (861268408073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430634204021 + 430634204022.

It is an arithmetic number, because the mean of its divisors is an integer number (430634204022).

Almost surely, 2^861268408043 is an apocalyptic number.

861268408043 is a deficient number, since it is larger than the sum of its proper divisors (1).

861268408043 is an equidigital number, since it uses as much as digits as its factorization.

861268408043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1769472, while the sum is 50.

The spelling of 861268408043 in words is "eight hundred sixty-one billion, two hundred sixty-eight million, four hundred eight thousand, forty-three".