208630423845 has 24 divisors (see below), whose sum is σ = 375019628256. Its totient is φ = 111269558736.

The previous prime is 208630423817. The next prime is 208630423849. The reversal of 208630423845 is 548324036802.

208630423845 is a `hidden beast` number, since 2 + 0 + 8 + 630 + 4 + 2 + 3 + 8 + 4 + 5 = 666.

It is not a de Polignac number, because 208630423845 - 2¹⁶ = 208630358309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 208630423845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208630423849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85854927 + ... + 85857356.

It is an arithmetic number, because the mean of its divisors is an integer number (15625817844).

Almost surely, 2^208630423845 is an apocalyptic number.

It is an amenable number.

208630423845 is a deficient number, since it is larger than the sum of its proper divisors (166389204411).

208630423845 is an equidigital number, since it uses as much as digits as its factorization.

208630423845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171712303 (or 171712291 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 208630423845 in words is "two hundred eight billion, six hundred thirty million, four hundred twenty-three thousand, eight hundred forty-five".