28416207779 has 2 divisors, whose sum is σ = 28416207780. Its totient is φ = 28416207778.

The previous prime is 28416207719. The next prime is 28416207793. The reversal of 28416207779 is 97770261482.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28416207779 is a prime.

It is a super-2 number, since 2×28416207779² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28416207779.

It is not a weakly prime, because it can be changed into another prime (28416207719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14208103889 + 14208103890.

It is an arithmetic number, because the mean of its divisors is an integer number (14208103890).

Almost surely, 2^28416207779 is an apocalyptic number.

28416207779 is a deficient number, since it is larger than the sum of its proper divisors (1).

28416207779 is an equidigital number, since it uses as much as digits as its factorization.

28416207779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 28416207779 in words is "twenty-eight billion, four hundred sixteen million, two hundred seven thousand, seven hundred seventy-nine".