7805481008779 has 2 divisors, whose sum is σ = 7805481008780. Its totient is φ = 7805481008778.

The previous prime is 7805481008777. The next prime is 7805481008789. The reversal of 7805481008779 is 9778001845087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7805481008779 - 2¹ = 7805481008777 is a prime.

Together with 7805481008777, 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 7805481008779.

It is not a weakly prime, because it can be changed into another prime (7805481008777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3902740504389 + 3902740504390.

It is an arithmetic number, because the mean of its divisors is an integer number (3902740504390).

Almost surely, 2^{7805481008779} is an apocalyptic number.

7805481008779 is a deficient number, since it is larger than the sum of its proper divisors (1).

7805481008779 is an equidigital number, since it uses as much as digits as its factorization.

7805481008779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31610880, while the sum is 64.

The spelling of 7805481008779 in words is "seven trillion, eight hundred five billion, four hundred eighty-one million, eight thousand, seven hundred seventy-nine".