28161284687 has 2 divisors, whose sum is σ = 28161284688. Its totient is φ = 28161284686.

The previous prime is 28161284651. The next prime is 28161284699. The reversal of 28161284687 is 78648216182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28161284687 - 2⁶ = 28161284623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28161284087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14080642343 + 14080642344.

It is an arithmetic number, because the mean of its divisors is an integer number (14080642344).

Almost surely, 2^28161284687 is an apocalyptic number.

28161284687 is a deficient number, since it is larger than the sum of its proper divisors (1).

28161284687 is an equidigital number, since it uses as much as digits as its factorization.

28161284687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2064384, while the sum is 53.

The spelling of 28161284687 in words is "twenty-eight billion, one hundred sixty-one million, two hundred eighty-four thousand, six hundred eighty-seven".