15903984312 has 128 divisors (see below), whose sum is σ = 46008576000. Its totient is φ = 5084674560.

The previous prime is 15903984311. The next prime is 15903984323. The reversal of 15903984312 is 21348930951.

It is a happy number.

15903984312 is a `hidden beast` number, since 1 + 590 + 3 + 9 + 8 + 43 + 12 = 666.

It is a super-2 number, since 2×15903984312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15903984311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 746139 + ... + 767157.

It is an arithmetic number, because the mean of its divisors is an integer number (359442000).

Almost surely, 2^15903984312 is an apocalyptic number.

15903984312 is a gapful number since it is divisible by the number (12) 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 15903984312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23004288000).

15903984312 is an abundant number, since it is smaller than the sum of its proper divisors (30104591688).

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

15903984312 is a wasteful number, since it uses less digits than its factorization.

15903984312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21178 (or 21168 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 15903984312 in words is "fifteen billion, nine hundred three million, nine hundred eighty-four thousand, three hundred twelve".