85417064477 has 2 divisors, whose sum is σ = 85417064478. Its totient is φ = 85417064476.

The previous prime is 85417064471. The next prime is 85417064501. The reversal of 85417064477 is 77446071458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80507820121 + 4909244356 = 283739^2 + 70066^2 .

It is a cyclic number.

It is not a de Polignac number, because 85417064477 - 2⁶ = 85417064413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85417064471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42708532238 + 42708532239.

It is an arithmetic number, because the mean of its divisors is an integer number (42708532239).

Almost surely, 2^85417064477 is an apocalyptic number.

It is an amenable number.

85417064477 is a deficient number, since it is larger than the sum of its proper divisors (1).

85417064477 is an equidigital number, since it uses as much as digits as its factorization.

85417064477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5268480, while the sum is 53.

The spelling of 85417064477 in words is "eighty-five billion, four hundred seventeen million, sixty-four thousand, four hundred seventy-seven".