76776479706809 has 2 divisors, whose sum is σ = 76776479706810. Its totient is φ = 76776479706808.

The previous prime is 76776479706799. The next prime is 76776479706827. The reversal of 76776479706809 is 90860797467767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75731069569600 + 1045410137209 = 8702360^2 + 1022453^2 .

It is a cyclic number.

It is not a de Polignac number, because 76776479706809 - 2⁴⁰ = 75676968079033 is a prime.

It is not a weakly prime, because it can be changed into another prime (76776473706809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38388239853404 + 38388239853405.

It is an arithmetic number, because the mean of its divisors is an integer number (38388239853405).

Almost surely, 2^{76776479706809} is an apocalyptic number.

It is an amenable number.

76776479706809 is a deficient number, since it is larger than the sum of its proper divisors (1).

76776479706809 is an equidigital number, since it uses as much as digits as its factorization.

76776479706809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9409768704, while the sum is 83.

The spelling of 76776479706809 in words is "seventy-six trillion, seven hundred seventy-six billion, four hundred seventy-nine million, seven hundred six thousand, eight hundred nine".