10648121065 has 4 divisors (see below), whose sum is σ = 12777745284. Its totient is φ = 8518496848.

The previous prime is 10648121063. The next prime is 10648121083. The reversal of 10648121065 is 56012184601.

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 2599878121 + 8048242944 = 50989^2 + 89712^2 .

It is a cyclic number.

It is not a de Polignac number, because 10648121065 - 2¹ = 10648121063 is a prime.

It is a super-2 number, since 2×10648121065² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10648121065.

It is not an unprimeable number, because it can be changed into a prime (10648121063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064812102 + ... + 1064812111.

It is an arithmetic number, because the mean of its divisors is an integer number (3194436321).

Almost surely, 2^10648121065 is an apocalyptic number.

It is an amenable number.

10648121065 is a deficient number, since it is larger than the sum of its proper divisors (2129624219).

10648121065 is an equidigital number, since it uses as much as digits as its factorization.

10648121065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129624218.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 10648121065 in words is "ten billion, six hundred forty-eight million, one hundred twenty-one thousand, sixty-five".