840682419661 has 8 divisors (see below), whose sum is σ = 991772808704. Its totient is φ = 697340255760.

The previous prime is 840682419659. The next prime is 840682419677. The reversal of 840682419661 is 166914286048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 840682419661 - 2¹ = 840682419659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840682419361) 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 7 ways as a sum of consecutive naturals, for example, 1937056050 + ... + 1937056483.

It is an arithmetic number, because the mean of its divisors is an integer number (123971601088).

Almost surely, 2^840682419661 is an apocalyptic number.

It is an amenable number.

840682419661 is a deficient number, since it is larger than the sum of its proper divisors (151090389043).

840682419661 is a wasteful number, since it uses less digits than its factorization.

840682419661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3874112571.

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 840682419661 in words is "eight hundred forty billion, six hundred eighty-two million, four hundred nineteen thousand, six hundred sixty-one".