10011644556 has 96 divisors (see below), whose sum is σ = 26223224832. Its totient is φ = 2957368320.

The previous prime is 10011644501. The next prime is 10011644557. The reversal of 10011644556 is 65544611001.

It is not an unprimeable number, because it can be changed into a prime (10011644557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212595 + ... + 255381.

It is an arithmetic number, because the mean of its divisors is an integer number (273158592).

Almost surely, 2^10011644556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10011644556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13111612416).

10011644556 is an abundant number, since it is smaller than the sum of its proper divisors (16211580276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10011644556 is a wasteful number, since it uses less digits than its factorization.

10011644556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42879 (or 42877 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 10011644556 in words is "ten billion, eleven million, six hundred forty-four thousand, five hundred fifty-six".