208149884077 has 2 divisors, whose sum is σ = 208149884078. Its totient is φ = 208149884076.

The previous prime is 208149884053. The next prime is 208149884143. The reversal of 208149884077 is 770488941802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183497429956 + 24652454121 = 428366^2 + 157011^2 .

It is a cyclic number.

It is not a de Polignac number, because 208149884077 - 2¹¹ = 208149882029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208149885077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104074942038 + 104074942039.

It is an arithmetic number, because the mean of its divisors is an integer number (104074942039).

Almost surely, 2^208149884077 is an apocalyptic number.

It is an amenable number.

208149884077 is a deficient number, since it is larger than the sum of its proper divisors (1).

208149884077 is an equidigital number, since it uses as much as digits as its factorization.

208149884077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7225344, while the sum is 58.

The spelling of 208149884077 in words is "two hundred eight billion, one hundred forty-nine million, eight hundred eighty-four thousand, seventy-seven".