10816906857605 has 4 divisors (see below), whose sum is σ = 12980288229132. Its totient is φ = 8653525486080.

The previous prime is 10816906857557. The next prime is 10816906857613. The reversal of 10816906857605 is 50675860961801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3743764484161 + 7073142373444 = 1934881^2 + 2659538^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10816906857605 is a prime.

It is a super-2 number, since 2×10816906857605² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081690685756 + ... + 1081690685765.

It is an arithmetic number, because the mean of its divisors is an integer number (3245072057283).

Almost surely, 2^{10816906857605} is an apocalyptic number.

It is an amenable number.

10816906857605 is a deficient number, since it is larger than the sum of its proper divisors (2163381371527).

10816906857605 is an equidigital number, since it uses as much as digits as its factorization.

10816906857605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163381371526.

The product of its (nonzero) digits is 21772800, while the sum is 62.

The spelling of 10816906857605 in words is "ten trillion, eight hundred sixteen billion, nine hundred six million, eight hundred fifty-seven thousand, six hundred five".