85766548541 has 2 divisors, whose sum is σ = 85766548542. Its totient is φ = 85766548540.

The previous prime is 85766548499. The next prime is 85766548561. The reversal of 85766548541 is 14584566758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53938204516 + 31828344025 = 232246^2 + 178405^2 .

It is a cyclic number.

It is not a de Polignac number, because 85766548541 - 2⁶ = 85766548477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85766548561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42883274270 + 42883274271.

It is an arithmetic number, because the mean of its divisors is an integer number (42883274271).

Almost surely, 2^85766548541 is an apocalyptic number.

It is an amenable number.

85766548541 is a deficient number, since it is larger than the sum of its proper divisors (1).

85766548541 is an equidigital number, since it uses as much as digits as its factorization.

85766548541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256000, while the sum is 59.

The spelling of 85766548541 in words is "eighty-five billion, seven hundred sixty-six million, five hundred forty-eight thousand, five hundred forty-one".