15847946978704 has 15 divisors (see below), whose sum is σ = 30705428123617. Its totient is φ = 7923965527456.

The previous prime is 15847946978663. The next prime is 15847946978713. The reversal of 15847946978704 is 40787964974851.

The square root of 15847946978704 is 3980948.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4537155603600 + 11310791375104 = 2130060^2 + 3363152^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15426174 + ... + 16421410.

Almost surely, 2^{15847946978704} is an apocalyptic number.

15847946978704 is the 3980948-th square number.

It is an amenable number.

15847946978704 is a deficient number, since it is larger than the sum of its proper divisors (14857481144913).

15847946978704 is an frugal number, since it uses more digits than its factorization.

15847946978704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990482 (or 995239 counting only the distinct ones).

The product of its (nonzero) digits is 3413975040, while the sum is 79.

The spelling of 15847946978704 in words is "fifteen trillion, eight hundred forty-seven billion, nine hundred forty-six million, nine hundred seventy-eight thousand, seven hundred four".