28623754721 has 2 divisors, whose sum is σ = 28623754722. Its totient is φ = 28623754720.

The previous prime is 28623754703. The next prime is 28623754723. The reversal of 28623754721 is 12745732682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28606648225 + 17106496 = 169135^2 + 4136^2 .

It is a cyclic number.

It is not a de Polignac number, because 28623754721 - 2¹⁴ = 28623738337 is a prime.

Together with 28623754723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28623754723) 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, 14311877360 + 14311877361.

It is an arithmetic number, because the mean of its divisors is an integer number (14311877361).

Almost surely, 2^28623754721 is an apocalyptic number.

It is an amenable number.

28623754721 is a deficient number, since it is larger than the sum of its proper divisors (1).

28623754721 is an equidigital number, since it uses as much as digits as its factorization.

28623754721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 47.

The spelling of 28623754721 in words is "twenty-eight billion, six hundred twenty-three million, seven hundred fifty-four thousand, seven hundred twenty-one".