10218839742865 has 16 divisors (see below), whose sum is σ = 13225507677648. Its totient is φ = 7535007277056.

The previous prime is 10218839742857. The next prime is 10218839742899. The reversal of 10218839742865 is 56824793881201.

It is a Cunningham number, because it is equal to 3196692²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 2947786815744 + 7271052927121 = 1716912^2 + 2696489^2 .

It is a cyclic number.

It is not a de Polignac number, because 10218839742865 - 2³ = 10218839742857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10218839742797 and 10218839742806.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116756344 + ... + 116843833.

It is an arithmetic number, because the mean of its divisors is an integer number (826594229853).

It is a 1-persistent number, because it is pandigital, but 2⋅10218839742865 = 20437679485730 is not.

Almost surely, 2^{10218839742865} is an apocalyptic number.

It is an amenable number.

10218839742865 is a deficient number, since it is larger than the sum of its proper divisors (3006667934783).

10218839742865 is a wasteful number, since it uses less digits than its factorization.

10218839742865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233600868.

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 10218839742865 in words is "ten trillion, two hundred eighteen billion, eight hundred thirty-nine million, seven hundred forty-two thousand, eight hundred sixty-five".