28144607819 has 2 divisors, whose sum is σ = 28144607820. Its totient is φ = 28144607818.

The previous prime is 28144607797. The next prime is 28144607833. The reversal of 28144607819 is 91870644182.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28144607819 is a prime.

It is a super-2 number, since 2×28144607819² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28144607419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14072303909 + 14072303910.

It is an arithmetic number, because the mean of its divisors is an integer number (14072303910).

Almost surely, 2^28144607819 is an apocalyptic number.

28144607819 is a deficient number, since it is larger than the sum of its proper divisors (1).

28144607819 is an equidigital number, since it uses as much as digits as its factorization.

28144607819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 28144607819 in words is "twenty-eight billion, one hundred forty-four million, six hundred seven thousand, eight hundred nineteen".