28344443551 has 2 divisors, whose sum is σ = 28344443552. Its totient is φ = 28344443550.

The previous prime is 28344443537. The next prime is 28344443573. The reversal of 28344443551 is 15534444382.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28344443551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28344443498 and 28344443507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28344443521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14172221775 + 14172221776.

It is an arithmetic number, because the mean of its divisors is an integer number (14172221776).

Almost surely, 2^28344443551 is an apocalyptic number.

28344443551 is a deficient number, since it is larger than the sum of its proper divisors (1).

28344443551 is an equidigital number, since it uses as much as digits as its factorization.

28344443551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 921600, while the sum is 43.

The spelling of 28344443551 in words is "twenty-eight billion, three hundred forty-four million, four hundred forty-three thousand, five hundred fifty-one".