208371807969 has 16 divisors (see below), whose sum is σ = 299222888832. Its totient is φ = 128219228928.

The previous prime is 208371807947. The next prime is 208371807983. The reversal of 208371807969 is 969708173802.

It is not a de Polignac number, because 208371807969 - 2¹³ = 208371799777 is a prime.

It is a super-2 number, since 2×208371807969² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208371807989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348484 + ... + 733610.

It is an arithmetic number, because the mean of its divisors is an integer number (18701430552).

Almost surely, 2^208371807969 is an apocalyptic number.

It is an amenable number.

208371807969 is a deficient number, since it is larger than the sum of its proper divisors (90851080863).

208371807969 is a wasteful number, since it uses less digits than its factorization.

208371807969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399016.

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 208371807969 in words is "two hundred eight billion, three hundred seventy-one million, eight hundred seven thousand, nine hundred sixty-nine".