85161563 has 2 divisors, whose sum is σ = 85161564. Its totient is φ = 85161562.

The previous prime is 85161541. The next prime is 85161607. The reversal of 85161563 is 36516158.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85161563 is a prime.

It is a Chen prime.

It is equal to p_4952528 and since 85161563 and 4952528 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85161523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42580781 + 42580782.

It is an arithmetic number, because the mean of its divisors is an integer number (42580782).

Almost surely, 2^85161563 is an apocalyptic number.

85161563 is a deficient number, since it is larger than the sum of its proper divisors (1).

85161563 is an equidigital number, since it uses as much as digits as its factorization.

85161563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 85161563 is about 9228.3022815684. The cubic root of 85161563 is about 439.9613654094.

The spelling of 85161563 in words is "eighty-five million, one hundred sixty-one thousand, five hundred sixty-three".