188102109649 has 2 divisors, whose sum is σ = 188102109650. Its totient is φ = 188102109648.

The previous prime is 188102109599. The next prime is 188102109683. The reversal of 188102109649 is 946901201881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148373647249 + 39728462400 = 385193^2 + 199320^2 .

It is a cyclic number.

It is not a de Polignac number, because 188102109649 - 2⁹ = 188102109137 is a prime.

It is not a weakly prime, because it can be changed into another prime (188102109049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94051054824 + 94051054825.

It is an arithmetic number, because the mean of its divisors is an integer number (94051054825).

Almost surely, 2^188102109649 is an apocalyptic number.

It is an amenable number.

188102109649 is a deficient number, since it is larger than the sum of its proper divisors (1).

188102109649 is an equidigital number, since it uses as much as digits as its factorization.

188102109649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 188102109649 in words is "one hundred eighty-eight billion, one hundred two million, one hundred nine thousand, six hundred forty-nine".