208815799164 has 96 divisors (see below), whose sum is σ = 558361982976. Its totient is φ = 59499048960.

The previous prime is 208815799141. The next prime is 208815799189. The reversal of 208815799164 is 461997518802.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 208815799098 and 208815799107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78177549 + ... + 78180219.

It is an arithmetic number, because the mean of its divisors is an integer number (5816270656).

Almost surely, 2^208815799164 is an apocalyptic number.

It is an amenable number.

208815799164 is an abundant number, since it is smaller than the sum of its proper divisors (349546183812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208815799164 is a wasteful number, since it uses less digits than its factorization.

208815799164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4875 (or 4873 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 60.

The spelling of 208815799164 in words is "two hundred eight billion, eight hundred fifteen million, seven hundred ninety-nine thousand, one hundred sixty-four".