208691593352 has 36 divisors (see below), whose sum is σ = 430132320135. Its totient is φ = 94853354640.

The previous prime is 208691593303. The next prime is 208691593379. The reversal of 208691593352 is 253395196802.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 104345796676 + 104345796676 = 323026^2 + 323026^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=323026.

It is a super-2 number, since 2×208691593352² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208691593294 and 208691593303.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14205803 + ... + 14220485.

Almost surely, 2^208691593352 is an apocalyptic number.

208691593352 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

208691593352 is an abundant number, since it is smaller than the sum of its proper divisors (221440726783).

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

208691593352 is an frugal number, since it uses more digits than its factorization.

208691593352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29394 (or 14696 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 208691593352 in words is "two hundred eight billion, six hundred ninety-one million, five hundred ninety-three thousand, three hundred fifty-two".