86709031777 has 12 divisors (see below), whose sum is σ = 95084592876. Its totient is φ = 78794401280.

The previous prime is 86709031699. The next prime is 86709031789. The reversal of 86709031777 is 77713090768.

It can be written as a sum of positive squares in 6 ways, for example, as 3051568081 + 83657463696 = 55241^2 + 289236^2 .

It is not a de Polignac number, because 86709031777 - 2⁷ = 86709031649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86709032777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3018124 + ... + 3046717.

It is an arithmetic number, because the mean of its divisors is an integer number (7923716073).

Almost surely, 2^86709031777 is an apocalyptic number.

It is an amenable number.

86709031777 is a deficient number, since it is larger than the sum of its proper divisors (8375561099).

86709031777 is a wasteful number, since it uses less digits than its factorization.

86709031777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6064916 (or 6064887 counting only the distinct ones).

The product of its (nonzero) digits is 3111696, while the sum is 55.

The spelling of 86709031777 in words is "eighty-six billion, seven hundred nine million, thirty-one thousand, seven hundred seventy-seven".