87778576211 has 2 divisors, whose sum is σ = 87778576212. Its totient is φ = 87778576210.

The previous prime is 87778576183. The next prime is 87778576219. The reversal of 87778576211 is 11267587778.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87778576211 - 2⁶ = 87778576147 is a prime.

It is not a weakly prime, because it can be changed into another prime (87778576219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43889288105 + 43889288106.

It is an arithmetic number, because the mean of its divisors is an integer number (43889288106).

Almost surely, 2^87778576211 is an apocalyptic number.

87778576211 is a deficient number, since it is larger than the sum of its proper divisors (1).

87778576211 is an equidigital number, since it uses as much as digits as its factorization.

87778576211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9219840, while the sum is 59.

The spelling of 87778576211 in words is "eighty-seven billion, seven hundred seventy-eight million, five hundred seventy-six thousand, two hundred eleven".