840111340765 has 4 divisors (see below), whose sum is σ = 1008133608924. Its totient is φ = 672089072608.

The previous prime is 840111340741. The next prime is 840111340793. The reversal of 840111340765 is 567043111048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 329042198884 + 511069141881 = 573622^2 + 714891^2 .

It is a cyclic number.

It is not a de Polignac number, because 840111340765 - 2²⁵ = 840077786333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84011134072 + ... + 84011134081.

It is an arithmetic number, because the mean of its divisors is an integer number (252033402231).

Almost surely, 2^840111340765 is an apocalyptic number.

It is an amenable number.

840111340765 is a deficient number, since it is larger than the sum of its proper divisors (168022268159).

840111340765 is a wasteful number, since it uses less digits than its factorization.

840111340765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168022268158.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 840111340765 in words is "eight hundred forty billion, one hundred eleven million, three hundred forty thousand, seven hundred sixty-five".