28764215223871 has 2 divisors, whose sum is σ = 28764215223872. Its totient is φ = 28764215223870.

The previous prime is 28764215223839. The next prime is 28764215223881. The reversal of 28764215223871 is 17832251246782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28764215223871 - 2⁵ = 28764215223839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28764215223881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14382107611935 + 14382107611936.

It is an arithmetic number, because the mean of its divisors is an integer number (14382107611936).

Almost surely, 2^{28764215223871} is an apocalyptic number.

28764215223871 is a deficient number, since it is larger than the sum of its proper divisors (1).

28764215223871 is an equidigital number, since it uses as much as digits as its factorization.

28764215223871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18063360, while the sum is 58.

The spelling of 28764215223871 in words is "twenty-eight trillion, seven hundred sixty-four billion, two hundred fifteen million, two hundred twenty-three thousand, eight hundred seventy-one".