102081878149 has 2 divisors, whose sum is σ = 102081878150. Its totient is φ = 102081878148.

The previous prime is 102081878117. The next prime is 102081878153. The reversal of 102081878149 is 941878180201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93067704900 + 9014173249 = 305070^2 + 94943^2 .

It is a cyclic number.

It is not a de Polignac number, because 102081878149 - 2⁵ = 102081878117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102081858149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51040939074 + 51040939075.

It is an arithmetic number, because the mean of its divisors is an integer number (51040939075).

Almost surely, 2^102081878149 is an apocalyptic number.

It is an amenable number.

102081878149 is a deficient number, since it is larger than the sum of its proper divisors (1).

102081878149 is an equidigital number, since it uses as much as digits as its factorization.

102081878149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 49.

The spelling of 102081878149 in words is "one hundred two billion, eighty-one million, eight hundred seventy-eight thousand, one hundred forty-nine".