1003604384640 has 1024 divisors, whose sum is σ = 3863496268800. Its totient is φ = 218388234240.

The previous prime is 1003604384579. The next prime is 1003604384641. The reversal of 1003604384640 is 464834063001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003604384641) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1637200974 + ... + 1637201586.

It is an arithmetic number, because the mean of its divisors is an integer number (3772945575).

Almost surely, 2^{1003604384640} is an apocalyptic number.

1003604384640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1003604384640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931748134400).

1003604384640 is an abundant number, since it is smaller than the sum of its proper divisors (2859891884160).

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

1003604384640 is a wasteful number, since it uses less digits than its factorization.

1003604384640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 1003604384640 in words is "one trillion, three billion, six hundred four million, three hundred eighty-four thousand, six hundred forty".