208056732779 has 12 divisors (see below), whose sum is σ = 249832444608. Its totient is φ = 172581620400.

The previous prime is 208056732731. The next prime is 208056732781. The reversal of 208056732779 is 977237650802.

It is a de Polignac number, because none of the positive numbers 2^k-208056732779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208056734779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68483252 + ... + 68486289.

It is an arithmetic number, because the mean of its divisors is an integer number (20819370384).

Almost surely, 2^208056732779 is an apocalyptic number.

208056732779 is a deficient number, since it is larger than the sum of its proper divisors (41775711829).

208056732779 is a wasteful number, since it uses less digits than its factorization.

208056732779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136969586 (or 136969579 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 56.

The spelling of 208056732779 in words is "two hundred eight billion, fifty-six million, seven hundred thirty-two thousand, seven hundred seventy-nine".