10521717165 has 12 divisors (see below), whose sum is σ = 18237643164. Its totient is φ = 5611582464.

The previous prime is 10521717139. The next prime is 10521717259. The reversal of 10521717165 is 56171712501.

It is a happy number.

10521717165 is a `hidden beast` number, since 1 + 0 + 521 + 7 + 1 + 71 + 65 = 666.

10521717165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5663766564 + 4857950601 = 75258^2 + 69699^2 .

It is not a de Polignac number, because 10521717165 - 2¹⁰ = 10521716141 is a prime.

It is a super-2 number, since 2×10521717165² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116907924 + ... + 116908013.

It is an arithmetic number, because the mean of its divisors is an integer number (1519803597).

Almost surely, 2^10521717165 is an apocalyptic number.

10521717165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10521717165 is a deficient number, since it is larger than the sum of its proper divisors (7715925999).

10521717165 is a wasteful number, since it uses less digits than its factorization.

10521717165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233815948 (or 233815945 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 36.

The spelling of 10521717165 in words is "ten billion, five hundred twenty-one million, seven hundred seventeen thousand, one hundred sixty-five".