10645320643 has 4 divisors (see below), whose sum is σ = 10660907448. Its totient is φ = 10629733840.

The previous prime is 10645320613. The next prime is 10645320659. The reversal of 10645320643 is 34602354601.

10645320643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34602354601 = 37 ⋅935198773.

It is a cyclic number.

It is not a de Polignac number, because 10645320643 - 2¹³ = 10645312451 is a prime.

It is a super-2 number, since 2×10645320643² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10645320599 and 10645320608.

It is not an unprimeable number, because it can be changed into a prime (10645320613) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7792378 + ... + 7793743.

It is an arithmetic number, because the mean of its divisors is an integer number (2665226862).

Almost surely, 2^10645320643 is an apocalyptic number.

10645320643 is a deficient number, since it is larger than the sum of its proper divisors (15586805).

10645320643 is an equidigital number, since it uses as much as digits as its factorization.

10645320643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15586804.

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 10645320643 in words is "ten billion, six hundred forty-five million, three hundred twenty thousand, six hundred forty-three".