208128850458 has 48 divisors (see below), whose sum is σ = 427961439360. Its totient is φ = 67448438400.

The previous prime is 208128850441. The next prime is 208128850471. The reversal of 208128850458 is 854058821802.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 208128850458.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6413698 + ... + 6446066.

It is an arithmetic number, because the mean of its divisors is an integer number (8915863320).

Almost surely, 2^208128850458 is an apocalyptic number.

208128850458 is an abundant number, since it is smaller than the sum of its proper divisors (219832588902).

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

208128850458 is a wasteful number, since it uses less digits than its factorization.

208128850458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32723 (or 32572 counting only the distinct ones).

The product of its (nonzero) digits is 1638400, while the sum is 51.

The spelling of 208128850458 in words is "two hundred eight billion, one hundred twenty-eight million, eight hundred fifty thousand, four hundred fifty-eight".