208545545801 has 16 divisors (see below), whose sum is σ = 215827476480. Its totient is φ = 201298865040.

The previous prime is 208545545729. The next prime is 208545545837. The reversal of 208545545801 is 108545545802.

It is a cyclic number.

It is not a de Polignac number, because 208545545801 - 2²⁶ = 208478436937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208545541801) 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 15 ways as a sum of consecutive naturals, for example, 27585260 + ... + 27592818.

It is an arithmetic number, because the mean of its divisors is an integer number (13489217280).

Almost surely, 2^208545545801 is an apocalyptic number.

It is an amenable number.

208545545801 is a deficient number, since it is larger than the sum of its proper divisors (7281930679).

208545545801 is a wasteful number, since it uses less digits than its factorization.

208545545801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9764.

The product of its (nonzero) digits is 1280000, while the sum is 47.

Subtracting from 208545545801 its reverse (108545545802), we obtain a palindrome (99999999999).

It can be divided in two parts, 20854 and 5545801, that added together give a palindrome (5566655).

The spelling of 208545545801 in words is "two hundred eight billion, five hundred forty-five million, five hundred forty-five thousand, eight hundred one".