15630440000 has 140 divisors (see below), whose sum is σ = 44296120704. Its totient is φ = 5358912000.

The previous prime is 15630439987. The next prime is 15630440047. The reversal of 15630440000 is 4403651.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (140).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 252089 + ... + 307911.

Almost surely, 2^15630440000 is an apocalyptic number.

15630440000 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 15630440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22148060352).

15630440000 is an abundant number, since it is smaller than the sum of its proper divisors (28665680704).

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

15630440000 is an frugal number, since it uses more digits than its factorization.

15630440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55862 (or 55837 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 15630440000 its reverse (4403651), we get a palindrome (15634843651).

The spelling of 15630440000 in words is "fifteen billion, six hundred thirty million, four hundred forty thousand".