28078780183 has 2 divisors, whose sum is σ = 28078780184. Its totient is φ = 28078780182.

The previous prime is 28078780181. The next prime is 28078780189. The reversal of 28078780183 is 38108787082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28078780183 - 2¹ = 28078780181 is a prime.

Together with 28078780181, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28078780183.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28078780181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14039390091 + 14039390092.

It is an arithmetic number, because the mean of its divisors is an integer number (14039390092).

Almost surely, 2^28078780183 is an apocalyptic number.

28078780183 is a deficient number, since it is larger than the sum of its proper divisors (1).

28078780183 is an equidigital number, since it uses as much as digits as its factorization.

28078780183 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1204224, while the sum is 52.

The spelling of 28078780183 in words is "twenty-eight billion, seventy-eight million, seven hundred eighty thousand, one hundred eighty-three".