15978103439016 has 256 divisors, whose sum is σ = 42619657248000. Its totient is φ = 4982762373120.

The previous prime is 15978103439003. The next prime is 15978103439059. The reversal of 15978103439016 is 61093430187951.

15978103439016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5889458076 + ... + 5889460788.

It is an arithmetic number, because the mean of its divisors is an integer number (166483036125).

Almost surely, 2^{15978103439016} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15978103439016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21309828624000).

15978103439016 is an abundant number, since it is smaller than the sum of its proper divisors (26641553808984).

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

15978103439016 is a wasteful number, since it uses less digits than its factorization.

15978103439016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124 (or 4120 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 57.

The spelling of 15978103439016 in words is "fifteen trillion, nine hundred seventy-eight billion, one hundred three million, four hundred thirty-nine thousand, sixteen".