208640497232 has 20 divisors (see below), whose sum is σ = 404519603136. Its totient is φ = 104248341600.

The previous prime is 208640497231. The next prime is 208640497277. The reversal of 208640497232 is 232794046802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208640497231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4470248 + ... + 4516679.

Almost surely, 2^208640497232 is an apocalyptic number.

It is an amenable number.

208640497232 is a deficient number, since it is larger than the sum of its proper divisors (195879105904).

208640497232 is a wasteful number, since it uses less digits than its factorization.

208640497232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8988386 (or 8988380 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 208640497232 in words is "two hundred eight billion, six hundred forty million, four hundred ninety-seven thousand, two hundred thirty-two".