186216472861 has 8 divisors (see below), whose sum is σ = 186424339320. Its totient is φ = 186008706048.

The previous prime is 186216472853. The next prime is 186216472879. The reversal of 186216472861 is 168274612681.

It can be written as a sum of positive squares in 4 ways, for example, as 86256165636 + 99960307225 = 293694^2 + 316165^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 186216472861 - 2³ = 186216472853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 186216472799 and 186216472808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186216472891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4085445 + ... + 4130773.

It is an arithmetic number, because the mean of its divisors is an integer number (23303042415).

Almost surely, 2^186216472861 is an apocalyptic number.

It is an amenable number.

186216472861 is a deficient number, since it is larger than the sum of its proper divisors (207866459).

186216472861 is a wasteful number, since it uses less digits than its factorization.

186216472861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49823.

The product of its digits is 1548288, while the sum is 52.

The spelling of 186216472861 in words is "one hundred eighty-six billion, two hundred sixteen million, four hundred seventy-two thousand, eight hundred sixty-one".