1003621136320 has 112 divisors (see below), whose sum is σ = 2611721167200. Its totient is φ = 364311019520.

The previous prime is 1003621136303. The next prime is 1003621136321. The reversal of 1003621136320 is 236311263001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003621136321) 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, 1752336 + ... + 2253424.

Almost surely, 2^{1003621136320} is an apocalyptic number.

1003621136320 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 1003621136320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1305860583600).

1003621136320 is an abundant number, since it is smaller than the sum of its proper divisors (1608100030880).

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

1003621136320 is a wasteful number, since it uses less digits than its factorization.

1003621136320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501686 (or 501676 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 1003621136320 its reverse (236311263001), we get a palindrome (1239932399321).

The spelling of 1003621136320 in words is "one trillion, three billion, six hundred twenty-one million, one hundred thirty-six thousand, three hundred twenty".