840706836321 has 16 divisors (see below), whose sum is σ = 1294778443968. Its totient is φ = 479547571200.

The previous prime is 840706836311. The next prime is 840706836323. The reversal of 840706836321 is 123638607048.

It is not a de Polignac number, because 840706836321 - 2⁶ = 840706836257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840706836323) 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, 749292520 + ... + 749293641.

It is an arithmetic number, because the mean of its divisors is an integer number (80923652748).

Almost surely, 2^840706836321 is an apocalyptic number.

It is an amenable number.

840706836321 is a deficient number, since it is larger than the sum of its proper divisors (454071607647).

840706836321 is a wasteful number, since it uses less digits than its factorization.

840706836321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498586192.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 840706836321 in words is "eight hundred forty billion, seven hundred six million, eight hundred thirty-six thousand, three hundred twenty-one".