102605543081 has 2 divisors, whose sum is σ = 102605543082. Its totient is φ = 102605543080.

The previous prime is 102605543039. The next prime is 102605543083. The reversal of 102605543081 is 180345506201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96351264025 + 6254279056 = 310405^2 + 79084^2 .

It is a cyclic number.

It is not a de Polignac number, because 102605543081 - 2³⁰ = 101531801257 is a prime.

It is a super-2 number, since 2×102605543081² (a number of 23 digits) contains 22 as substring.

Together with 102605543083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102605543083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51302771540 + 51302771541.

It is an arithmetic number, because the mean of its divisors is an integer number (51302771541).

Almost surely, 2^102605543081 is an apocalyptic number.

It is an amenable number.

102605543081 is a deficient number, since it is larger than the sum of its proper divisors (1).

102605543081 is an equidigital number, since it uses as much as digits as its factorization.

102605543081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 102605543081 in words is "one hundred two billion, six hundred five million, five hundred forty-three thousand, eighty-one".