208640497233 has 16 divisors (see below), whose sum is σ = 318487144320. Its totient is φ = 119013603456.

The previous prime is 208640497231. The next prime is 208640497277. The reversal of 208640497233 is 332794046802.

It is not a de Polignac number, because 208640497233 - 2¹ = 208640497231 is a prime.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8718510 + ... + 8742407.

It is an arithmetic number, because the mean of its divisors is an integer number (19905446520).

Almost surely, 2^208640497233 is an apocalyptic number.

It is an amenable number.

208640497233 is a deficient number, since it is larger than the sum of its proper divisors (109846647087).

208640497233 is a wasteful number, since it uses less digits than its factorization.

208640497233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17461496.

The product of its (nonzero) digits is 1741824, while the sum is 48.

The spelling of 208640497233 in words is "two hundred eight billion, six hundred forty million, four hundred ninety-seven thousand, two hundred thirty-three".