15647420085124 has 27 divisors (see below), whose sum is σ = 27425374449487. Its totient is φ = 7811617522688.

The previous prime is 15647420085029. The next prime is 15647420085133. The reversal of 15647420085124 is 42158002474651.

The square root of 15647420085124 is 3955682.

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

It can be written as a sum of positive squares in 4 ways, for example, as 9667634555524 + 5979785529600 = 3109282^2 + 2445360^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7349656092 + ... + 7349658220.

Almost surely, 2^{15647420085124} is an apocalyptic number.

15647420085124 is the 3955682-nd square number.

It is an amenable number.

15647420085124 is a deficient number, since it is larger than the sum of its proper divisors (11777954364363).

15647420085124 is an frugal number, since it uses more digits than its factorization.

15647420085124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120 (or 3060 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 49.

Multiplying 15647420085124 by its sum of digits (49), we get a square (766723584171076 = 27689774²).

The spelling of 15647420085124 in words is "fifteen trillion, six hundred forty-seven billion, four hundred twenty million, eighty-five thousand, one hundred twenty-four".