102506435149 has 2 divisors, whose sum is σ = 102506435150. Its totient is φ = 102506435148.

The previous prime is 102506435147. The next prime is 102506435177. The reversal of 102506435149 is 941534605201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99797232649 + 2709202500 = 315907^2 + 52050^2 .

It is an emirp because it is prime and its reverse (941534605201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102506435149 - 2¹ = 102506435147 is a prime.

It is a super-2 number, since 2×102506435149² (a number of 23 digits) contains 22 as substring.

Together with 102506435147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102506435147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51253217574 + 51253217575.

It is an arithmetic number, because the mean of its divisors is an integer number (51253217575).

Almost surely, 2^102506435149 is an apocalyptic number.

It is an amenable number.

102506435149 is a deficient number, since it is larger than the sum of its proper divisors (1).

102506435149 is an equidigital number, since it uses as much as digits as its factorization.

102506435149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 102506435149 in words is "one hundred two billion, five hundred six million, four hundred thirty-five thousand, one hundred forty-nine".