208542862771 has 4 divisors (see below), whose sum is σ = 215733996000. Its totient is φ = 201351729544.

The previous prime is 208542862769. The next prime is 208542862777. The reversal of 208542862771 is 177268245802.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 208542862771 - 2¹ = 208542862769 is a prime.

It is a super-2 number, since 2×208542862771² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208542862777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3595566571 + ... + 3595566628.

It is an arithmetic number, because the mean of its divisors is an integer number (53933499000).

Almost surely, 2^208542862771 is an apocalyptic number.

208542862771 is a deficient number, since it is larger than the sum of its proper divisors (7191133229).

208542862771 is an equidigital number, since it uses as much as digits as its factorization.

208542862771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7191133228.

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 208542862771 in words is "two hundred eight billion, five hundred forty-two million, eight hundred sixty-two thousand, seven hundred seventy-one".