85311310577 has 2 divisors, whose sum is σ = 85311310578. Its totient is φ = 85311310576.

The previous prime is 85311310507. The next prime is 85311310597. The reversal of 85311310577 is 77501311358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85311310561 + 16 = 292081^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 85311310577 - 2²² = 85307116273 is a prime.

It is not a weakly prime, because it can be changed into another prime (85311310507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42655655288 + 42655655289.

It is an arithmetic number, because the mean of its divisors is an integer number (42655655289).

Almost surely, 2^85311310577 is an apocalyptic number.

It is an amenable number.

85311310577 is a deficient number, since it is larger than the sum of its proper divisors (1).

85311310577 is an equidigital number, since it uses as much as digits as its factorization.

85311310577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 85311310577 in words is "eighty-five billion, three hundred eleven million, three hundred ten thousand, five hundred seventy-seven".