5561177066779 has 2 divisors, whose sum is σ = 5561177066780. Its totient is φ = 5561177066778.

The previous prime is 5561177066743. The next prime is 5561177066813. The reversal of 5561177066779 is 9776607711655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5561177066779 - 2¹³ = 5561177058587 is a prime.

It is not a weakly prime, because it can be changed into another prime (5561177066579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780588533389 + 2780588533390.

It is an arithmetic number, because the mean of its divisors is an integer number (2780588533390).

Almost surely, 2^{5561177066779} is an apocalyptic number.

5561177066779 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561177066779 is an equidigital number, since it uses as much as digits as its factorization.

5561177066779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116688600, while the sum is 67.

The spelling of 5561177066779 in words is "five trillion, five hundred sixty-one billion, one hundred seventy-seven million, sixty-six thousand, seven hundred seventy-nine".