16616550101 has 4 divisors (see below), whose sum is σ = 16626579852. Its totient is φ = 16606520352.

The previous prime is 16616550061. The next prime is 16616550103. The reversal of 16616550101 is 10105561661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10105561661 = 13 ⋅777350897.

It can be written as a sum of positive squares in 2 ways, for example, as 5263647601 + 11352902500 = 72551^2 + 106550^2 .

It is a cyclic number.

It is not a de Polignac number, because 16616550101 - 2³⁰ = 15542808277 is a prime.

It is a super-2 number, since 2×16616550101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616550103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5012390 + ... + 5015703.

It is an arithmetic number, because the mean of its divisors is an integer number (4156644963).

Almost surely, 2^16616550101 is an apocalyptic number.

It is an amenable number.

16616550101 is a deficient number, since it is larger than the sum of its proper divisors (10029751).

16616550101 is a wasteful number, since it uses less digits than its factorization.

16616550101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10029750.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 16616550101 in words is "sixteen billion, six hundred sixteen million, five hundred fifty thousand, one hundred one".