9985018700777 has 2 divisors, whose sum is σ = 9985018700778. Its totient is φ = 9985018700776.

The previous prime is 9985018700771. The next prime is 9985018700801. The reversal of 9985018700777 is 7770078105899.

9985018700777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6915132752896 + 3069885947881 = 2629664^2 + 1752109^2 .

It is a cyclic number.

It is not a de Polignac number, because 9985018700777 - 2²⁶ = 9984951591913 is a prime.

It is not a weakly prime, because it can be changed into another prime (9985018700771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4992509350388 + 4992509350389.

It is an arithmetic number, because the mean of its divisors is an integer number (4992509350389).

Almost surely, 2^{9985018700777} is an apocalyptic number.

It is an amenable number.

9985018700777 is a deficient number, since it is larger than the sum of its proper divisors (1).

9985018700777 is an equidigital number, since it uses as much as digits as its factorization.

9985018700777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62233920, while the sum is 68.

The spelling of 9985018700777 in words is "nine trillion, nine hundred eighty-five billion, eighteen million, seven hundred thousand, seven hundred seventy-seven".