2309840673856 has 21 divisors (see below), whose sum is σ = 4583614214389. Its totient is φ = 1154914257664.

The previous prime is 2309840673853. The next prime is 2309840673857. The reversal of 2309840673856 is 6583760489032.

The square root of 2309840673856 is 1519816.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1840363560000 + 469477113856 = 1356600^2 + 685184^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2309840673794 and 2309840673803.

It is not an unprimeable number, because it can be changed into a prime (2309840673853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12063540 + ... + 12253516.

Almost surely, 2^{2309840673856} is an apocalyptic number.

2309840673856 is the 1519816-th square number.

It is an amenable number.

2309840673856 is a deficient number, since it is larger than the sum of its proper divisors (2273773540533).

2309840673856 is an frugal number, since it uses more digits than its factorization.

2309840673856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379966 (or 189979 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 61.

The spelling of 2309840673856 in words is "two trillion, three hundred nine billion, eight hundred forty million, six hundred seventy-three thousand, eight hundred fifty-six".