885716561 has 2 divisors, whose sum is σ = 885716562. Its totient is φ = 885716560.

The previous prime is 885716509. The next prime is 885716567. The reversal of 885716561 is 165617588.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885419536 + 297025 = 29756^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 885716561 - 2¹⁴ = 885700177 is a prime.

It is not a weakly prime, because it can be changed into another prime (885716567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442858280 + 442858281.

It is an arithmetic number, because the mean of its divisors is an integer number (442858281).

Almost surely, 2^885716561 is an apocalyptic number.

It is an amenable number.

885716561 is a deficient number, since it is larger than the sum of its proper divisors (1).

885716561 is an equidigital number, since it uses as much as digits as its factorization.

885716561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 47.

The square root of 885716561 is about 29760.9905917125. The cubic root of 885716561 is about 960.3545279832.

The spelling of 885716561 in words is "eight hundred eighty-five million, seven hundred sixteen thousand, five hundred sixty-one".