10555220644 has 48 divisors (see below), whose sum is σ = 19969721856. Its totient is φ = 4863398400.

The previous prime is 10555220629. The next prime is 10555220647. The reversal of 10555220644 is 44602255501.

It is a super-2 number, since 2×10555220644² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (10555220647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919299 + ... + 930709.

It is an arithmetic number, because the mean of its divisors is an integer number (416035872).

Almost surely, 2^10555220644 is an apocalyptic number.

It is an amenable number.

10555220644 is a deficient number, since it is larger than the sum of its proper divisors (9414501212).

10555220644 is a wasteful number, since it uses less digits than its factorization.

10555220644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11716 (or 11714 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 10555220644 in words is "ten billion, five hundred fifty-five million, two hundred twenty thousand, six hundred forty-four".