840640986380361 has 16 divisors (see below), whose sum is σ = 1125217056314880. Its totient is φ = 558248608894080.

The previous prime is 840640986380357. The next prime is 840640986380413. The reversal of 840640986380361 is 163083689046048.

It is not a de Polignac number, because 840640986380361 - 2² = 840640986380357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 840640986380292 and 840640986380301.

It is not an unprimeable number, because it can be changed into a prime (840640986388361) 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, 309715950 + ... + 312418391.

It is an arithmetic number, because the mean of its divisors is an integer number (70326066019680).

Almost surely, 2^{840640986380361} is an apocalyptic number.

It is an amenable number.

840640986380361 is a deficient number, since it is larger than the sum of its proper divisors (284576069934519).

840640986380361 is a wasteful number, since it uses less digits than its factorization.

840640986380361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622136096.

The product of its (nonzero) digits is 143327232, while the sum is 66.

The spelling of 840640986380361 in words is "eight hundred forty trillion, six hundred forty billion, nine hundred eighty-six million, three hundred eighty thousand, three hundred sixty-one".