102804823657 has 2 divisors, whose sum is σ = 102804823658. Its totient is φ = 102804823656.

The previous prime is 102804823637. The next prime is 102804823699. The reversal of 102804823657 is 756328408201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57291294736 + 45513528921 = 239356^2 + 213339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102804823657 is a prime.

It is not a weakly prime, because it can be changed into another prime (102804823607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51402411828 + 51402411829.

It is an arithmetic number, because the mean of its divisors is an integer number (51402411829).

Almost surely, 2^102804823657 is an apocalyptic number.

It is an amenable number.

102804823657 is a deficient number, since it is larger than the sum of its proper divisors (1).

102804823657 is an equidigital number, since it uses as much as digits as its factorization.

102804823657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 102804823657 in words is "one hundred two billion, eight hundred four million, eight hundred twenty-three thousand, six hundred fifty-seven".