10645621664345 has 4 divisors (see below), whose sum is σ = 12774745997220. Its totient is φ = 8516497331472.

The previous prime is 10645621664303. The next prime is 10645621664393. The reversal of 10645621664345 is 54346612654601.

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 2249049100489 + 8396572563856 = 1499683^2 + 2897684^2 .

It is a cyclic number.

It is not a de Polignac number, because 10645621664345 - 2³⁰ = 10644547922521 is a prime.

It is a super-2 number, since 2×10645621664345² (a number of 27 digits) contains 22 as substring.

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, 1064562166430 + ... + 1064562166439.

It is an arithmetic number, because the mean of its divisors is an integer number (3193686499305).

Almost surely, 2^{10645621664345} is an apocalyptic number.

It is an amenable number.

10645621664345 is a deficient number, since it is larger than the sum of its proper divisors (2129124332875).

10645621664345 is an equidigital number, since it uses as much as digits as its factorization.

10645621664345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129124332874.

The product of its (nonzero) digits is 12441600, while the sum is 53.

The spelling of 10645621664345 in words is "ten trillion, six hundred forty-five billion, six hundred twenty-one million, six hundred sixty-four thousand, three hundred forty-five".