28761821063 has 2 divisors, whose sum is σ = 28761821064. Its totient is φ = 28761821062.

The previous prime is 28761821047. The next prime is 28761821117. The reversal of 28761821063 is 36012816782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28761821063 - 2⁴ = 28761821047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28761821003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14380910531 + 14380910532.

It is an arithmetic number, because the mean of its divisors is an integer number (14380910532).

Almost surely, 2^28761821063 is an apocalyptic number.

28761821063 is a deficient number, since it is larger than the sum of its proper divisors (1).

28761821063 is an equidigital number, since it uses as much as digits as its factorization.

28761821063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 28761821063 in words is "twenty-eight billion, seven hundred sixty-one million, eight hundred twenty-one thousand, sixty-three".