1002555544220 has 12 divisors (see below), whose sum is σ = 2105366642904. Its totient is φ = 401022217680.

The previous prime is 1002555544213. The next prime is 1002555544223. The reversal of 1002555544220 is 224455552001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002555544223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25063888586 + ... + 25063888625.

It is an arithmetic number, because the mean of its divisors is an integer number (175447220242).

Almost surely, 2^{1002555544220} is an apocalyptic number.

1002555544220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002555544220 is an abundant number, since it is smaller than the sum of its proper divisors (1102811098684).

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

1002555544220 is a wasteful number, since it uses less digits than its factorization.

1002555544220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50127777220 (or 50127777218 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 1002555544220 in words is "one trillion, two billion, five hundred fifty-five million, five hundred forty-four thousand, two hundred twenty".