102646404649 has 2 divisors, whose sum is σ = 102646404650. Its totient is φ = 102646404648.

The previous prime is 102646404647. The next prime is 102646404769. The reversal of 102646404649 is 946404646201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98072317225 + 4574087424 = 313165^2 + 67632^2 .

It is a cyclic number.

It is not a de Polignac number, because 102646404649 - 2¹ = 102646404647 is a prime.

Together with 102646404647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 102646404599 and 102646404608.

It is not a weakly prime, because it can be changed into another prime (102646404647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51323202324 + 51323202325.

It is an arithmetic number, because the mean of its divisors is an integer number (51323202325).

Almost surely, 2^102646404649 is an apocalyptic number.

It is an amenable number.

102646404649 is a deficient number, since it is larger than the sum of its proper divisors (1).

102646404649 is an equidigital number, since it uses as much as digits as its factorization.

102646404649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 46.

The spelling of 102646404649 in words is "one hundred two billion, six hundred forty-six million, four hundred four thousand, six hundred forty-nine".