28031108202649 has 2 divisors, whose sum is σ = 28031108202650. Its totient is φ = 28031108202648.

The previous prime is 28031108202611. The next prime is 28031108202661. The reversal of 28031108202649 is 94620280113082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26320675815424 + 1710432387225 = 5130368^2 + 1307835^2 .

It is a cyclic number.

It is not a de Polignac number, because 28031108202649 - 2¹⁵ = 28031108169881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28031108202599 and 28031108202608.

It is not a weakly prime, because it can be changed into another prime (28031108202049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14015554101324 + 14015554101325.

It is an arithmetic number, because the mean of its divisors is an integer number (14015554101325).

Almost surely, 2^{28031108202649} is an apocalyptic number.

It is an amenable number.

28031108202649 is a deficient number, since it is larger than the sum of its proper divisors (1).

28031108202649 is an equidigital number, since it uses as much as digits as its factorization.

28031108202649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 28031108202649 in words is "twenty-eight trillion, thirty-one billion, one hundred eight million, two hundred two thousand, six hundred forty-nine".