16551656101 has 4 divisors (see below), whose sum is σ = 16551913612. Its totient is φ = 16551398592.

The previous prime is 16551656063. The next prime is 16551656119. The reversal of 16551656101 is 10165615561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5315868100 + 11235788001 = 72910^2 + 105999^2 .

It is a cyclic number.

It is not a de Polignac number, because 16551656101 - 2⁷ = 16551655973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16551654101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56701 + ... + 190573.

It is an arithmetic number, because the mean of its divisors is an integer number (4137978403).

Almost surely, 2^16551656101 is an apocalyptic number.

It is an amenable number.

16551656101 is a deficient number, since it is larger than the sum of its proper divisors (257511).

16551656101 is a wasteful number, since it uses less digits than its factorization.

16551656101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257510.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 16551656101 in words is "sixteen billion, five hundred fifty-one million, six hundred fifty-six thousand, one hundred one".