208766214157 has 2 divisors, whose sum is σ = 208766214158. Its totient is φ = 208766214156.

The previous prime is 208766214143. The next prime is 208766214161. The reversal of 208766214157 is 751412667802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115685695876 + 93080518281 = 340126^2 + 305091^2 .

It is a cyclic number.

It is not a de Polignac number, because 208766214157 - 2⁷ = 208766214029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208766214157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208766214187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104383107078 + 104383107079.

It is an arithmetic number, because the mean of its divisors is an integer number (104383107079).

Almost surely, 2^208766214157 is an apocalyptic number.

It is an amenable number.

208766214157 is a deficient number, since it is larger than the sum of its proper divisors (1).

208766214157 is an equidigital number, since it uses as much as digits as its factorization.

208766214157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 208766214157 in words is "two hundred eight billion, seven hundred sixty-six million, two hundred fourteen thousand, one hundred fifty-seven".