208312707198 has 32 divisors (see below), whose sum is σ = 434776962816. Its totient is φ = 66412830528.

The previous prime is 208312707181. The next prime is 208312707259. The reversal of 208312707198 is 891707213802.

It is a happy number.

It is a super-2 number, since 2×208312707198² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1722690 + ... + 1839642.

It is an arithmetic number, because the mean of its divisors is an integer number (13586780088).

Almost surely, 2^208312707198 is an apocalyptic number.

208312707198 is an abundant number, since it is smaller than the sum of its proper divisors (226464255618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208312707198 is a wasteful number, since it uses less digits than its factorization.

208312707198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129888.

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 208312707198 in words is "two hundred eight billion, three hundred twelve million, seven hundred seven thousand, one hundred ninety-eight".