208421627471 has 16 divisors (see below), whose sum is σ = 214318684800. Its totient is φ = 202625280000.

The previous prime is 208421627437. The next prime is 208421627501. The reversal of 208421627471 is 174726124802.

208421627471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208421627471 is a prime.

It is a super-3 number, since 3×208421627471³ (a number of 35 digits) contains 333 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 (208421627431) 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 15 ways as a sum of consecutive naturals, for example, 1632971 + ... + 1755971.

It is an arithmetic number, because the mean of its divisors is an integer number (13394917800).

Almost surely, 2^208421627471 is an apocalyptic number.

208421627471 is a deficient number, since it is larger than the sum of its proper divisors (5897057329).

208421627471 is a wasteful number, since it uses less digits than its factorization.

208421627471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123410.

The product of its (nonzero) digits is 301056, while the sum is 44.

The spelling of 208421627471 in words is "two hundred eight billion, four hundred twenty-one million, six hundred twenty-seven thousand, four hundred seventy-one".