16556230657 has 8 divisors (see below), whose sum is σ = 17545756896. Its totient is φ = 15568441152.

The previous prime is 16556230651. The next prime is 16556230687. The reversal of 16556230657 is 75603265561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16556230657 - 2¹¹ = 16556228609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16556230651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414523 + ... + 452704.

It is an arithmetic number, because the mean of its divisors is an integer number (2193219612).

Almost surely, 2^16556230657 is an apocalyptic number.

16556230657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16556230657 is a deficient number, since it is larger than the sum of its proper divisors (989526239).

16556230657 is a wasteful number, since it uses less digits than its factorization.

16556230657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868367.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 16556230657 in words is "sixteen billion, five hundred fifty-six million, two hundred thirty thousand, six hundred fifty-seven".