208398691072 has 432 divisors, whose sum is σ = 515444440896. Its totient is φ = 83452723200.

The previous prime is 208398691063. The next prime is 208398691121. The reversal of 208398691072 is 270196893802.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1057861278 + ... + 1057861474.

It is an arithmetic number, because the mean of its divisors is an integer number (1193158428).

Almost surely, 2^208398691072 is an apocalyptic number.

208398691072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208398691072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257722220448).

208398691072 is an abundant number, since it is smaller than the sum of its proper divisors (307045749824).

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

208398691072 is a wasteful number, since it uses less digits than its factorization.

208398691072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 208398691072 in words is "two hundred eight billion, three hundred ninety-eight million, six hundred ninety-one thousand, seventy-two".