10565715606221 has 8 divisors (see below), whose sum is σ = 10738987829688. Its totient is φ = 10392445440000.

The previous prime is 10565715606203. The next prime is 10565715606301. The reversal of 10565715606221 is 12260651756501.

It can be written as a sum of positive squares in 4 ways, for example, as 3337070365225 + 7228645240996 = 1826765^2 + 2688614^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10565715606221 - 2¹⁴ = 10565715589837 is a prime.

It is a super-2 number, since 2×10565715606221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10565711606221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12533621 + ... + 13350021.

It is an arithmetic number, because the mean of its divisors is an integer number (1342373478711).

Almost surely, 2^{10565715606221} is an apocalyptic number.

It is an amenable number.

10565715606221 is a deficient number, since it is larger than the sum of its proper divisors (173272223467).

10565715606221 is an equidigital number, since it uses as much as digits as its factorization.

10565715606221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028623.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 10565715606221 in words is "ten trillion, five hundred sixty-five billion, seven hundred fifteen million, six hundred six thousand, two hundred twenty-one".