87077477777 has 2 divisors, whose sum is σ = 87077477778. Its totient is φ = 87077477776.

The previous prime is 87077477743. The next prime is 87077477797. The reversal of 87077477777 is 77777477078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85101141841 + 1976335936 = 291721^2 + 44456^2 .

It is a cyclic number.

It is not a de Polignac number, because 87077477777 - 2¹⁸ = 87077215633 is a prime.

It is not a weakly prime, because it can be changed into another prime (87077477797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43538738888 + 43538738889.

It is an arithmetic number, because the mean of its divisors is an integer number (43538738889).

Almost surely, 2^87077477777 is an apocalyptic number.

It is an amenable number.

87077477777 is a deficient number, since it is larger than the sum of its proper divisors (1).

87077477777 is an equidigital number, since it uses as much as digits as its factorization.

87077477777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184473632, while the sum is 68.

The spelling of 87077477777 in words is "eighty-seven billion, seventy-seven million, four hundred seventy-seven thousand, seven hundred seventy-seven".