10555220643 has 32 divisors (see below), whose sum is σ = 15495840000. Its totient is φ = 6337833600.

The previous prime is 10555220629. The next prime is 10555220647. The reversal of 10555220643 is 34602255501.

10555220643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-10555220643 is a prime.

It is a super-2 number, since 2×10555220643² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (10555220647) 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 31 ways as a sum of consecutive naturals, for example, 2067508 + ... + 2072606.

It is an arithmetic number, because the mean of its divisors is an integer number (484245000).

Almost surely, 2^10555220643 is an apocalyptic number.

10555220643 is a deficient number, since it is larger than the sum of its proper divisors (4940619357).

10555220643 is a wasteful number, since it uses less digits than its factorization.

10555220643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 10555220643 in words is "ten billion, five hundred fifty-five million, two hundred twenty thousand, six hundred forty-three".