1002555021444 has 24 divisors (see below), whose sum is σ = 2349785168640. Its totient is φ = 332686418784.

The previous prime is 1002555021431. The next prime is 1002555021473. The reversal of 1002555021444 is 4441205552001.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187320759 + ... + 187326110.

It is an arithmetic number, because the mean of its divisors is an integer number (97907715360).

Almost surely, 2^{1002555021444} is an apocalyptic number.

It is an amenable number.

1002555021444 is an abundant number, since it is smaller than the sum of its proper divisors (1347230147196).

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

1002555021444 is a wasteful number, since it uses less digits than its factorization.

1002555021444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374647099 (or 374647097 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

The spelling of 1002555021444 in words is "one trillion, two billion, five hundred fifty-five million, twenty-one thousand, four hundred forty-four".