16565636016725 has 24 divisors (see below), whose sum is σ = 20631972192480. Its totient is φ = 13194135800000.

The previous prime is 16565636016679. The next prime is 16565636016757. The reversal of 16565636016725 is 52761063656561.

It is a happy number.

It is not a de Polignac number, because 16565636016725 - 2¹⁴ = 16565636000341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8909150 + ... + 10606800.

It is an arithmetic number, because the mean of its divisors is an integer number (859665508020).

Almost surely, 2^{16565636016725} is an apocalyptic number.

It is an amenable number.

16565636016725 is a deficient number, since it is larger than the sum of its proper divisors (4066336175755).

16565636016725 is a wasteful number, since it uses less digits than its factorization.

16565636016725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699381 (or 1699376 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 59.

The spelling of 16565636016725 in words is "sixteen trillion, five hundred sixty-five billion, six hundred thirty-six million, sixteen thousand, seven hundred twenty-five".