209463692258 has 6 divisors (see below), whose sum is σ = 314196509259. Its totient is φ = 104731522506.

The previous prime is 209463692257. The next prime is 209463692309. The reversal of 209463692258 is 852296364902.

It can be written as a sum of positive squares in only one way, i.e., 104731846129 + 104731846129 = 323623^2 + 323623^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=323623.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (209463692257) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 485435 + ... + 809057.

Almost surely, 2^209463692258 is an apocalyptic number.

209463692258 is a deficient number, since it is larger than the sum of its proper divisors (104732817001).

209463692258 is an frugal number, since it uses more digits than its factorization.

209463692258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647248 (or 323625 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 209463692258 in words is "two hundred nine billion, four hundred sixty-three million, six hundred ninety-two thousand, two hundred fifty-eight".