187449522049 has 2 divisors, whose sum is σ = 187449522050. Its totient is φ = 187449522048.

The previous prime is 187449522017. The next prime is 187449522079. The reversal of 187449522049 is 940225944781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135023177025 + 52426345024 = 367455^2 + 228968^2 .

It is an emirp because it is prime and its reverse (940225944781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187449522049 - 2⁵ = 187449522017 is a prime.

It is not a weakly prime, because it can be changed into another prime (187449522079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93724761024 + 93724761025.

It is an arithmetic number, because the mean of its divisors is an integer number (93724761025).

Almost surely, 2^187449522049 is an apocalyptic number.

It is an amenable number.

187449522049 is a deficient number, since it is larger than the sum of its proper divisors (1).

187449522049 is an equidigital number, since it uses as much as digits as its factorization.

187449522049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 187449522049 in words is "one hundred eighty-seven billion, four hundred forty-nine million, five hundred twenty-two thousand, forty-nine".