208864901033 has 18 divisors (see below), whose sum is σ = 222667729326. Its totient is φ = 195239746944.

The previous prime is 208864901029. The next prime is 208864901059. The reversal of 208864901033 is 330109468802.

It can be written as a sum of positive squares in 3 ways, for example, as 648822784 + 208216078249 = 25472^2 + 456307^2 .

It is not a de Polignac number, because 208864901033 - 2² = 208864901029 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208864901023) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 374981591 + ... + 374982147.

It is an arithmetic number, because the mean of its divisors is an integer number (12370429407).

Almost surely, 2^208864901033 is an apocalyptic number.

It is an amenable number.

208864901033 is a deficient number, since it is larger than the sum of its proper divisors (13802828293).

208864901033 is an frugal number, since it uses more digits than its factorization.

208864901033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 208864901033 in words is "two hundred eight billion, eight hundred sixty-four million, nine hundred one thousand, thirty-three".