28655616019 has 2 divisors, whose sum is σ = 28655616020. Its totient is φ = 28655616018.

The previous prime is 28655615999. The next prime is 28655616049. The reversal of 28655616019 is 91061655682.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28655616019 is a prime.

It is a super-2 number, since 2×28655616019² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28655616049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14327808009 + 14327808010.

It is an arithmetic number, because the mean of its divisors is an integer number (14327808010).

Almost surely, 2^28655616019 is an apocalyptic number.

28655616019 is a deficient number, since it is larger than the sum of its proper divisors (1).

28655616019 is an equidigital number, since it uses as much as digits as its factorization.

28655616019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 28655616019 in words is "twenty-eight billion, six hundred fifty-five million, six hundred sixteen thousand, nineteen".