208159916912639 has 16 divisors (see below), whose sum is σ = 210434872088064. Its totient is φ = 205889984071200.

The previous prime is 208159916912611. The next prime is 208159916912723. The reversal of 208159916912639 is 936219619951802.

It is a cyclic number.

It is not a de Polignac number, because 208159916912639 - 2⁴⁴ = 190567730868223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208159216912639) 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, 309024374 + ... + 309697244.

It is an arithmetic number, because the mean of its divisors is an integer number (13152179505504).

Almost surely, 2^{208159916912639} is an apocalyptic number.

208159916912639 is a deficient number, since it is larger than the sum of its proper divisors (2274955175425).

208159916912639 is a wasteful number, since it uses less digits than its factorization.

208159916912639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676598.

The product of its (nonzero) digits is 113374080, while the sum is 71.

The spelling of 208159916912639 in words is "two hundred eight trillion, one hundred fifty-nine billion, nine hundred sixteen million, nine hundred twelve thousand, six hundred thirty-nine".